Vulnerability 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 Score
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.7, < 4.14.314 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LS
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.13Mailing ListPatch
- https://github.com/torvalds/linux/commit/3037933448f60f9acb705997eae62013ecb81e0Patch
- https://lists.debian.org/debian-lts-announce/2023/06/msg00008.htmlMailing ListThird 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 ListPatch
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LS
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.13Mailing ListPatch
- https://github.com/torvalds/linux/commit/3037933448f60f9acb705997eae62013ecb81e0Patch
- https://lists.debian.org/debian-lts-announce/2023/06/msg00008.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2023-31436?
CVE-2023-31436 is a vulnerability with a CVSS score of 7.8 (HIGH). 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.
How severe is CVE-2023-31436?
CVE-2023-31436 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-31436?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.