Vulnerability in Linux Kernel
CVE-2023-23454
cbq_classify in net/sched/sch_cbq.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service (slab-out-of-bounds read) because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classification results).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (21.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Linux Kernel
- Debian Linux — versions 11.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2023/01/10/1 (Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2023/01/10/4 (Mailing List, Third Party Advisory)
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
- www.debian.org/security/2023/dsa-5324 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/03/msg00000.html (mailing-list)
- lists.debian.org/debian-lts-announce/2023/05/msg00006.html (mailing-list)
Frequently asked questions
- What is CVE-2023-23454?
- CVE-2023-23454 is a medium-severity vulnerability in Linux Kernel, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 5.5/10. Published 2023-01-12.
- How severe is CVE-2023-23454?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2023-23454 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.