CVE-2023-3611

Out-of-bounds write in Linux kernel's net/sched: sch_qfq component

Description

An out-of-bounds write vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation. The qfq_change_agg() function in net/sched/sch_qfq.c allows an out-of-bounds write because lmax is updated according to packet sizes without bounds checks. We recommend upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory kernel.org Vendor Advisory kernel.dance
Affected: Linux Kernel
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e337087c3b5805fe0b8a46ba622a962880b5d64 patch vendor advisory mailing list
https://kernel.dance/3e337087c3b5805fe0b8a46ba622a962880b5d64 patch vendor advisory
https://www.debian.org/security/2023/dsa-5480 third party advisory
https://security.netapp.com/advisory/ntap-20230908-0002/ third party advisory
https://www.debian.org/security/2023/dsa-5492 third party advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html mailing list

Frequently Asked Questions

What is the severity of CVE-2023-3611?
CVE-2023-3611 has been scored as a high severity vulnerability.
How to fix CVE-2023-3611?
To fix CVE-2023-3611, 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-2023-3611 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-3611 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.
What software or system is affected by CVE-2023-3611?
CVE-2023-3611 affects Linux Kernel.
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