Buffer overflow in Linux Kernel
CVE-2023-35788
An issue was discovered in fl_set_geneve_opt in net/sched/cls_flower.c in the Linux kernel before 6.3.7. It allows an out-of-bounds write in the flower classifier code via TCA_FLOWER_KEY_ENC_OPTS_GENEVE packets. This may result in denial of service or privilege escalation.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (43.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: -0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2023/06/07/1 (Exploit, Mailing List)
- git.kernel.org/linus/4d56304e5827c8cc8cc18c75343d283af7c4825c (Patch)
- cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.7 (Patch, Mailing List)
- [oss-security] 20230617 Re: Linux kernel: off-by-one in fl_set_geneve_opt (mailing-list, Exploit, Mailing List)
- DSA-5448 (vendor-advisory, Third Party Advisory)
- security.netapp.com/advisory/ntap-20230714-0002/ (Third Party Advisory)
- [debian-lts-announce] 20230727 [SECURITY] [DLA 3508-1] linux security update (mailing-list, Mailing List, Third Party Advisory)
- DSA-5480 (vendor-advisory, Third Party Advisory)
- packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097… (VDB Entry, Third Party Advisory)
- [debian-lts-announce] 20231019 [SECURITY] [DLA 3623-1] linux-5.10 security update (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-35788?
- CVE-2023-35788 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2023-06-16.
- How severe is CVE-2023-35788?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2023-35788 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.