CVE-2023-31436

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.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.03%
Vendor Advisory debian.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/torvalds/linux/commit/3037933448f60f9acb705997eae62013ecb81e0d patch
https://www.spinics.net/lists/stable-commits/msg294885.html patch mailing list
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.13 patch mailing list
https://www.debian.org/security/2023/dsa-5402 vendor advisory vdb entry
https://lists.debian.org/debian-lts-announce/2023/06/msg00008.html third party advisory mailing list
https://security.netapp.com/advisory/ntap-20230609-0001/ third party advisory
http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html third party advisory vdb entry
http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.html third party advisory vdb entry
http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html

Frequently Asked Questions

What is the severity of CVE-2023-31436?
CVE-2023-31436 has been scored as a high severity vulnerability.
How to fix CVE-2023-31436?
To fix CVE-2023-31436, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-31436 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-31436 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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