CWE-121 · Stack-based Buffer Overflow

3851 CVEs classified under CWE-121 (Stack-based Buffer Overflow). Browse by severity and year.

Top CVEs for CWE-121
CVESeverityScorePublishedSummary
CVE-2026-101039Critical10.02026-09-28A vulnerability was identified in FAST FAC1900R 20190827_2.0.2. Affected by this issue is the function copy_msg_element of the component devdiscover Service. S…
CVE-2026-96257Critical10.02026-09-23A flaw has been found in Fast FAC1203R Gigabit Edition 2.0.4. Affected by this issue is the function copy_msg_element of the component Device Discovery Service…
CVE-2026-94089Critical10.02026-09-20A vulnerability was determined in D-Link DIR-868L 2.01b05. This issue affects the function strcpy of the file /webfa_authentication.cgi of the component Authen…
CVE-2026-94003Critical10.02026-09-20A vulnerability has been found in Comfast CF-N1-S 2.6.0.1. Impacted is the function get_css_path_from_uri of the file /cgi-bin/mbox-config of the component Web…
CVE-2026-86296Critical10.02026-09-07A vulnerability was determined in D-Link DIR-822A A_101. This vulnerability affects the function strcpy of the file udhcpcd/serverpacket.c of the component udh…
CVE-2026-79911Critical10.02026-08-25A security vulnerability has been detected in TOTOLINK N600R 4.3.0cu.7647_B20210106. The affected element is the function setSystemConfig of the file /cgi-bin/…
CVE-2026-77946Critical10.02026-08-22A vulnerability was determined in TRENDnet TEW-821DAP 2.2.01b05. Affected by this vulnerability is the function uci_safe_get of the file /cgi-bin/apply_time.cg…
CVE-2026-76008Critical10.02026-08-19A flaw has been found in Comfast CF-N1-S 2.6.0.1. This affects the function get_para_from_uri of the file /cgi-bin/mbox-config of the component URI Parameter P…
CVE-2026-75784Critical10.02026-08-18A vulnerability was detected in TRENDnet TEW-WLC100 1v2.07b01. Affected by this issue is the function FUN_0040da4c of the file /usr/nginx/sbin/nginx of the com…
CVE-2026-74843Critical10.02026-08-17A vulnerability was determined in Wavlink WN531P3 and WN535M1 V250922. Affected by this vulnerability is the function strcpy of the file /etc/lighttpd/www/cgi-…
CVE-2026-12848Critical10.02026-06-24GV-I/O Box 4E is a smart embedded device with 4 input and 4 relays output that can be controlled over Ethernet and RS-485. DVRSearch is a service running by d…
CVE-2026-12847Critical10.02026-06-24GV-I/O Box 4E is a smart embedded device with 4 input and 4 relays output that can be controlled over Ethernet and RS-485. DVRSearch is a service running by d…
CVE-2026-12846Critical10.02026-06-24GV-I/O Box 4E is a smart embedded device with 4 input and 4 relays output that can be controlled over Ethernet and RS-485. DVRSearch is a service running by d…
CVE-2026-12485Critical10.02026-06-24GV-I/O Box 4E is a smart embedded device with 4 input and 4 relays output that can be controlled over Ethernet and RS-485. DVRSearch is a service running by d…
CVE-2026-37541Critical10.02026-05-01Buffer overflow vulnerability in Open Vehicle Monitoring System 3 (OVMS3) 3.3.005. In canformat_gvret.cpp, the length field in GVRET binary data is not properl…
CVE-2017-20230Critical10.02026-04-21Storable versions before 3.05 for Perl has a stack overflow. The retrieve_hook function stored the length of the class name into a signed integer but in read…
CVE-2025-54328Critical10.02026-04-06An issue was discovered in SMS in Samsung Mobile Processor, Wearable Processor, and Modem Exynos 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400…
CVE-2024-36258Critical10.02025-01-14A stack-based buffer overflow vulnerability exists in the touchlist_sync.cgi touchlistsync() functionality of Wavlink AC3000 M33A8.V5030.210505. A specially cr…
CVE-2024-39791Critical10.02024-08-12Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge repeaters, software versions 3.3.23.6.9 and…
CVE-2023-3943Critical10.02024-05-21Stack-based Buffer Overflow vulnerability in ZkTeco-based OEM devices allows, in some cases, the execution of arbitrary code. Due to the lack of protection mec…
All CVEs classified under CWE-121 — newest first (page 1 of 39)
CVESeverityScorePublishedSummary
CVE-2026-86182026-10-01A stack-based buffer overflow vulnerability exists in the TDDPv2 service (/usr/bin/tddp) on Deco M9 Plus due to insufficient validation of decrypted request da…
CVE-2026-63292High7.52026-10-01Stack-based buffer overflow in mod_vhost_alias in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows a remote client to cause…
CVE-2026-12627Critical9.82026-10-01Fortra's Core Privileged Access Manager (BoKS) contains a stack-based buffer overflow vulnerability in boks_autoregisterd. A remote attacker with network acces…
CVE-2026-103531Medium5.52026-10-01A flaw has been found in OpenSC up to 0.27.1. The impacted element is the function setcos_construct_fci_44 of the file src/libopensc/card-setcos.c. Executing a…
CVE-2026-47593High7.82026-09-30NVIDIA GPU Display Driver for Windows contains a vulnerability in the kernel mode layer where an unprivileged user can cause an out-of-bounds write. A successf…
CVE-2026-47506Medium5.52026-09-30NVIDIA GPU Display Driver for Windows contains a vulnerability in the kernel-mode color transform path where excessive kernel stack use occurs when evaluating…
CVE-2026-103432High8.12026-09-30apcupsd through 3.14.14 has an sscanf stack-based buffer overflow in getupsvar() in src/cgi/upsfetch.c (used by upsstats.cgi, multimon.cgi, and upsfstats.cgi)…
CVE-2026-103226Medium6.32026-09-30A vulnerability was identified in Artifex Ghostscript up to 10.09.0. Affected is the function type1_callsubr of the file devices/vector/gdevpsfx.c of the compo…
CVE-2026-92870High7.52026-09-30A stack-based buffer overflow vulnerability exists in Pgpool-II, which may allow an unauthenticated attacker to cause abnormal process termination.
CVE-2026-814332026-09-30A stack-based buffer overflow vulnerability in WatchGuard Fireware OS's DHCP fingerprinting daemon (fingerd) allows an unauthenticated attacker with adjacent n…
CVE-2026-181452026-09-30A stack-based buffer overflow vulnerability in the spamBlocker (spamd) service of WatchGuard Fireware OS allows an authenticated attacker with administrator pr…
CVE-2026-94952Critical9.82026-09-29A stack-based buffer overflow vulnerability exists in the web management interface of TOTOLINK N150RT (NTR150) firmware V3.4.0-B20201030. It is reachable throu…
CVE-2026-94953High8.82026-09-29A stack-based buffer overflow vulnerability exists in the web management interface of TOTOLINK N150RT (NTR150) firmware V3.4.0-B20201030. It is reachable throu…
CVE-2026-102302High8.82026-09-29Buffer overflow in V8 in Google Chrome prior to 154.0.8037.92 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (…
CVE-2026-94954High8.82026-09-29A stack-based buffer overflow vulnerability exists in the web management interface of TOTOLINK N150RT (NTR150) firmware V3.4.0-B20201030. It is reachable throu…
CVE-2026-71922026-09-29A stack-based buffer overflow vulnerability in the Dbit T-CPE301K 4G WiFi minirouter allows an authenticated attacker to cause a denial of service (DoS) and a…
CVE-2026-96415Medium5.52026-09-29Catapult DCT2000 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
CVE-2026-101354Critical9.62026-09-29A security flaw has been discovered in FAST FAC1203R 20200116_2.0.4. The affected element is the function _tWlanTask of the component MmtAtePrase Parser. Perfo…
CVE-2026-101081Critical9.12026-09-28A security flaw has been discovered in D-Link DI-8400 16.07. This vulnerability affects the function menu_nat_more_asp of the file menu_nat_more.asp of the com…
CVE-2026-101074Critical9.82026-09-28A weakness has been identified in Netcore NR289-GE 1.4.5102. The affected element is the function password-check of the file /bin/boa of the component Authenti…
CVE-2026-101039Critical10.02026-09-28A vulnerability was identified in FAST FAC1900R 20190827_2.0.2. Affected by this issue is the function copy_msg_element of the component devdiscover Service. S…
CVE-2026-101038Critical9.92026-09-28A vulnerability was determined in FAST FAC1200R 5.0_20201119_1.0.2. Affected by this vulnerability is the function MmtAtePrase of the component MmtAtePrase Par…
CVE-2026-101037Critical9.92026-09-28A vulnerability was found in FAST FAC1200R 5.0_20201119_1.0.2. Affected is the function parse_advertisement_frame of the component devdiscover Service. The man…
CVE-2026-95104High7.52026-09-28Stack-based buffer overflow vulnerability exists in BUFFALO Wi-Fi products. A non-authenticated crafted HTTP request may cause a denial-of-service (DoS) condit…
CVE-2026-101003Medium5.32026-09-28A weakness has been identified in Cesanta Mongoose up to 7.21. Affected by this vulnerability is the function fn of the file tutorials/mqtt/mqtt-server/main.c…
CVE-2026-100908High7.52026-09-28A vulnerability has been found in Eyeplus 57.0.0.0308. This affects an unknown function of the component p2pcam HTTP Parser. Such manipulation leads to stack-b…
CVE-2026-100745Medium6.32026-09-27A vulnerability has been found in Edimax BR-6428nC 1.16. The impacted element is an unknown function of the file /goform/formWizSurvey of the component Wireles…
CVE-2026-88388High7.52026-09-24Espruino 2v29 (commit bffc6d0) contains a stack-based buffer overflow vulnerability in the JavaScript error stack-trace handling path on 64-bit builds. A remot…
CVE-2026-58008High8.12026-09-24Stack-based buffer overflow vulnerability in Altera Trusted Firmware on HPS allows Exploitation of Improperly Configured or Implemented Memory Protections. Th…
CVE-2026-13465High8.12026-09-24Stack-based buffer overflow vulnerability in Altera Trusted Firmware on HPS allows Exploitation of Improperly Configured or Implemented Memory Protections. Th…
CVE-2026-96676Medium6.32026-09-23A vulnerability was identified in Fast FAC1900R 20190827_2.0.2. The impacted element is the function get_alias_name of the component uhttpd. Such manipulation…
CVE-2026-96257Critical10.02026-09-23A flaw has been found in Fast FAC1203R Gigabit Edition 2.0.4. Affected by this issue is the function copy_msg_element of the component Device Discovery Service…
CVE-2026-83962High7.82026-09-22Substance3D - Modeler is affected by a Stack-based Buffer Overflow vulnerability that could result in arbitrary code execution in the context of the current us…
CVE-2026-75676High7.82026-09-22Bridge is affected by a Stack-based Buffer Overflow vulnerability that could result in arbitrary code execution in the context of the current user. Exploitatio…
CVE-2026-86054High7.82026-09-22Notepad++ is a free and open-source source code editor. Prior to 8.9.8, Notepad++ contains a stack buffer overflow in NppParameters::writeSession in PowerEdito…
CVE-2026-85279High8.62026-09-22Notepad++ is a free and open-source source code editor. Prior to 8.9.8, Notepad++ contains a stack buffer overflow in PluginsManager::loadPluginFromPath in Pow…
CVE-2026-78662026-09-22Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers. This issue affects Connext Professional: from 7…
CVE-2026-95818Low3.62026-09-22A stack-based buffer overflow in the dynamic loader (ld.so) of the GNU C Library (glibc) versions 2.14 through 2.44 allows a local attacker to crash or corrupt…
CVE-2026-80147Critical9.92026-09-22Lantronix SLC8000/SLC9000 before firmware v9.7.0.2, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882/SLCx-03/SLCx-02 contain a sta…
CVE-2026-80146Critical9.92026-09-22Lantronix SLC8000/SLC9000 before firmware v9.7.0.2, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882/SLCx-03/SLCx-02 contain a sta…
CVE-2026-93433Medium5.52026-09-21A flaw was found in libstoragemgmt. An attacker with control over a local or virtual storage device could provide specially crafted SCSI (Small Computer System…
CVE-2026-88408Medium6.52026-09-21FalkorDB (Redis module) v4.20.1 to v4.20.4 was discovered to contain a stack overflow in the _GetGroup() function (/ops/op_aggregate.c). This vulnerability all…
CVE-2026-88406High7.52026-09-21FalkorDB (Redis module) v4.20.1 to v4.20.4 was discovered to contain a stack overflow in the _ValidateUnion_Clauses function (/ast/ast_validations.c). This vul…
CVE-2026-616742026-09-21Fluent Bit is a fast and lightweight logs, metrics, and traces processor for Linux, BSD, macOS, and Windows. From 0.11.0 until 5.0.8, plugins/out_forward/forwa…
CVE-2026-94184Medium5.32026-09-21A stack-based buffer overflow flaw was found in fetchmail when built with NTLM support. A malicious or compromised mail server advertising NTLM authentication…
CVE-2026-94089Critical10.02026-09-20A vulnerability was determined in D-Link DIR-868L 2.01b05. This issue affects the function strcpy of the file /webfa_authentication.cgi of the component Authen…
CVE-2026-94003Critical10.02026-09-20A vulnerability has been found in Comfast CF-N1-S 2.6.0.1. Impacted is the function get_css_path_from_uri of the file /cgi-bin/mbox-config of the component Web…
CVE-2026-61548High8.12026-09-18Rsyslog is a rocket-fast system for log processing. From 7.5.4 until 8.2606.0, the optional mmpstrucdata plugin's parseSD_PARAM function in plugins/mmpstrucdat…
CVE-2026-81946Medium4.42026-09-18PLANET IGS-5225-8P2T4S industrial managed switch V1 and V2 firmware versions before 1.2412b260707 and 2.2412b260519 use MD5-based password hashing, a cryptogra…
CVE-2026-81945Medium6.62026-09-18PLANET IGS-5225-8P2T4S industrial managed switch V1 and V2 firmware versions before 1.2412b260707 and 2.2412b260519 contain a stack-based buffer overflow in th…
CVE-2026-81944High7.52026-09-18PLANET IGS-5225-8P2T4S industrial managed switch V1 and V2 firmware versions before 1.2412b260707 and 2.2412b260519 contain a stack-based buffer overflow in th…
CVE-2026-59181Medium6.12026-09-18OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.20.0, 3.1.15.0…
CVE-2026-93372Critical9.62026-09-17Buffer overflow in WebGL in Google Chrome on on Android prior to 153.0.8010.52 allowed a remote attacker to execute arbitrary code outside the sandbox via a cr…
CVE-2026-19477High7.82026-09-17There is stack-based buffer overflow vulnerability recently discovered in MCC Universal Library for Linux (uldaq).  This may result in information disclosure o…
CVE-2026-90823Critical9.82026-09-17FatPipe MPVPN, WARP, and IPVPN appliances running the end-of-life firmware version 10.1.2r60p100 contain a stack-based buffer overflow in /usr/sbin/auth_user_p…
CVE-2026-81480High7.22026-09-17Dell OpenManage Server Administrator, versions prior to 11.1.0.3, contains a Stack-based Buffer Overflow vulnerability. A high privileged attacker with remote…
CVE-2026-25283High8.82026-09-17Memory Corruption when copying unverified data from an external source exceeds the allocated buffer size.
CVE-2026-81546High7.72026-09-17The Affinity by Canva application before 3.3.0 (September 2026 release) did not perform adequate bounds checking when parsing Affinity document files leading t…
CVE-2026-86358Medium6.52026-09-16Dell Update Package Framework, versions prior to 26.07.03, contains a Stack-based Buffer Overflow vulnerability. An unauthenticated attacker with adjacent netw…
CVE-2026-91843Critical9.82026-09-16A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges.
CVE-2026-76869High7.22026-09-15Netcore NR255-V version 1.5.130703 contains a stack-based buffer overflow in reboot_timer_set.cgi caused by improper sscanf token parsing. Attackers can exploi…
CVE-2026-76861High8.82026-09-15Netcore NR255-V version 1.5.130703 contains a stack-based buffer overflow in ntools_tcpdump_start_set.cgi caused by an unsized sprintf call when processing for…
CVE-2026-76860High8.82026-09-15Netcore NR255-V version 1.5.130703 contains a stack-based buffer overflow in wake_up_set.cgi caused by unbounded tokenization of MAC and ID input. Attackers ca…
CVE-2026-76689High7.22026-09-15A vulnerability exists in the configuration processing logic of the affected component where malformed input is improperly processed. An authenticated remote a…
CVE-2026-76676High8.82026-09-15Buffer overflow vulnerabilities exist in the underlying operating system of EdgeConnect SD-WAN Gateways that could allow an unauthenticated adjacent attacker t…
CVE-2026-19774High7.12026-09-15BlueZ A2DP Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on a…
CVE-2026-12150High7.02026-09-15IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4…
CVE-2026-91826Medium4.42026-09-15Stack-based buffer overflow vulnerability in Samsung Opensource rLottie allows attackers to overflow buffers, leading to memory corruption when rendering craft…
CVE-2026-91090Low3.92026-09-15A vulnerability was determined in GPAC up to f1219cde. The affected element is the function gf_node_activate_ex of the file scenegraph/base_scenegraph.c. This…
CVE-2026-91003Critical9.12026-09-15A flaw has been found in D-Link DI-8300 16.07. The affected element is the function rzgl_asp of the file /rzgl.asp of the component CGI Service. This manipulat…
CVE-2026-91001Critical9.92026-09-15A security flaw has been discovered in D-Link DI-8400 16.07. This affects the function ddns_asp of the file /ddns.asp of the component DDNS Configuration. Perf…
CVE-2026-90824Low3.32026-09-14A vulnerability has been found in GPAC 26.07.0. Affected is the function gf_sg_dom_event_bubble of the file src/scenegraph/dom_events.c of the component MP4Box…
CVE-2026-545592026-09-14PocketSphinx is a small speech recognizer. Prior to 5.1.1, the trie language-model loaders in src/lm/ngram_model_trie.c do not adequately validate boundary con…
CVE-2026-89020Medium4.32026-09-14MikroTik RouterOS before 7.23.4 (long-term) and 7.24.2 (stable) contains a stack-based buffer overflow vulnerability in the mtget binary's TFTP RRQ builder fun…
CVE-2026-19542Medium5.62026-09-14Calling tdelete on a sufficiently deep tree in the GNU C Library version 2.1 to 2.44 may write one pointer past the end of an alloca-allocated array on the sta…
CVE-2026-90693Critical9.92026-09-14A flaw has been found in D-Link DIR-878 120B05. This impacts the function SetWan3Settings of the component WAN Settings. This manipulation of the argument Prim…
CVE-2026-90692Critical9.92026-09-14A vulnerability was detected in D-Link DIR-878 120B05. This affects the function SetDynamicDNSIPv6Settings of the component Dynamic DNS IPv6 Settings. The mani…
CVE-2026-90689High8.82026-09-14A security flaw has been discovered in Tenda W20E 15.11.0.61068_1546_841_CN_TDC. Impacted is the function formDelWebAuthWhiteUser. Performing a manipulation of…
CVE-2026-90688Medium6.52026-09-14A vulnerability was identified in Tenda W20E 15.11.0.61068_1546_841_CN_TDC. This issue affects the function formIPMacBindAdd of the component HTTP Handler. Suc…
CVE-2026-82785Medium4.32026-09-14Stack-based buffer overflow vulnerability exists in Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*. Receiving a specially crafted request created and sent…
CVE-2023-46273High8.82026-09-14Bonjour Gateway in Extreme Networks IQ Engine before 10.6r1a, and through 10.6r4 before 10.6r5, has an ah_bgd buffer overflow via ah_event_send.
CVE-2026-90680Critical9.92026-09-14A security flaw has been discovered in D-Link DIR-823G 1.0.2B05_20181207. The impacted element is the function strcpy of the file /HNAP1/SetStaticRouteSettings…
CVE-2026-33963High7.52026-09-14An issue was discovered in camera in Samsung Mobile Processor Exynos 1330, 1380, 1480, 2400, 1580, 2500, 2600, and 1680. A stack-based buffer overflow occurs w…
CVE-2026-90779High7.52026-09-13SIPp through 3.7.7 contains a stack buffer overflow vulnerability in createAuthHeader() when processing SIP authentication challenges with oversized algorithm…
CVE-2026-90558Critical9.82026-09-12sngrep through 1.8.4 contains stack buffer overflow vulnerabilities in SIP attribute formatting routines when header values exceed the 255-byte buffer limit. A…
CVE-2026-86093High7.52026-09-10IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 could allow an attacker with the ability to control or impersonate a DRDA server endpoint to execute a…
CVE-2026-154192026-09-10In the silabser.sys driver for CP210x devices v11.5.0 and earlier, a local unprivileged user with a malicious device can use malformed packets to corrupt kerne…
CVE-2026-88047High7.82026-09-10Tesseract is an open source OCR engine. In version 5.5.3 and earlier, Classify::ReadNormProtos in src/classify/normmatch.cpp parses the NORMPROTO component of…
CVE-2026-88289High7.52026-09-10GeoVision GV-LPC2211 V1.14 (260903) fails to validate attacker-controlled variable-length fields before copying them into fixed-size stack buffers in multiple…
CVE-2026-88287High7.52026-09-10GeoVision GV-LPC2211 V1.13 fails to bound the number of Scopes tokens in unauthenticated ONVIF WS-Discovery Probe requests, allowing a remote attacker to corru…
CVE-2026-88284Medium4.92026-09-10GeoVision GV-LPC2211 V1.13 fails to limit repeated User elements in ONVIF SetUser requests, allowing an authenticated administrator to overwrite stack control…
CVE-2026-88283Medium4.92026-09-10GeoVision GV-LPC2211 V1.13 fails to limit repeated User elements in ONVIF CreateUsers requests, allowing an authenticated administrator to overwrite stack cont…
CVE-2026-88281Medium4.92026-09-10GeoVision GV-LPC2211 V1.13 fails to limit repeated Username elements in ONVIF DeleteUsers requests, allowing an authenticated administrator to overflow a stack…
CVE-2026-88280Medium4.92026-09-10GeoVision GV-LPC2211 V1.13 copies an oversized ONVIF SetUser password into a fixed stack field, allowing an authenticated administrator to crash the ONVIF work…
CVE-2026-88279Medium4.92026-09-10GeoVision GV-LPC2211 V1.13 copies oversized ONVIF CreateUsers username or password values into fixed stack fields, allowing an authenticated administrator to c…
CVE-2026-88268Medium6.52026-09-10GeoVision GV-LPC2211 V1.13 contains an authenticated stack buffer overflow in SSVR fragment reassembly that allows a valid user to crash the SSVR service.
CVE-2026-42805High8.42026-09-10A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI385 SensorAPI (C library) within the debug message parser function bhi385_parse_de…
CVE-2026-42804High7.62026-09-10A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI360 SensorAPI(C-Library) in versions up to and including commit d6b200416a. The…
CVE-2026-82079High8.42026-09-10A stack-based buffer overflow vulnerability in the Nintendo Switch local wireless networking functionality may allow an attacker within wireless range to execu…
CVE-2026-21093Medium6.72026-09-09Stack-based buffer overflow in PROCA trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to write out-of-bounds memory.