Buffer overflow in Linux Kernel
CVE-2023-31436
qfq_change_class in net/sched/sch_qfq.c in the Linux kernel before 6.2.13 allows an out-of-bounds write because lmax can exceed QFQ_MIN_LMAX.
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: 0.006 (46.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/torvalds/linux/commit/3037933448f60f9acb705997eae62013ecb81e0d (Patch)
- www.spinics.net/lists/stable-commits/msg294885.html (Patch, Mailing List)
- cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.13 (Patch, Mailing List)
- www.debian.org/security/2023/dsa-5402 (vendor-advisory, VDB Entry)
- lists.debian.org/debian-lts-announce/2023/06/msg00008.html (mailing-list, Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20230609-0001/ (Third Party Advisory)
- packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095… (VDB Entry, Third Party Advisory)
- packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096… (VDB Entry, Third Party Advisory)
- packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099…
Frequently asked questions
- What is CVE-2023-31436?
- CVE-2023-31436 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2023-04-28.
- How severe is CVE-2023-31436?
- High severity. CVSS v3 base score is 7.8 out of 10.