VulnerabilityModified
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.
HIGH 7.8EPSS 0.59%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.59%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.59% probability · 46th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
References
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.13Mailing List, Patch
- https://github.com/torvalds/linux/commit/3037933448f60f9acb705997eae62013ecb81e0dPatch
- https://lists.debian.org/debian-lts-announce/2023/06/msg00008.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230609-0001/Third Party Advisory
- https://www.debian.org/security/2023/dsa-5402VDB Entry
- https://www.spinics.net/lists/stable-commits/msg294885.htmlMailing List, Patch
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.13Mailing List, Patch
- https://github.com/torvalds/linux/commit/3037933448f60f9acb705997eae62013ecb81e0dPatch
- https://lists.debian.org/debian-lts-announce/2023/06/msg00008.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230609-0001/Third Party Advisory
- https://www.debian.org/security/2023/dsa-5402VDB Entry
- https://www.spinics.net/lists/stable-commits/msg294885.htmlMailing List, Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.