CVE-2023-4921

CVSS V2 None CVSS V3 None

Description

A use-after-free vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation. When the plug qdisc is used as a class of the qfq qdisc, sending network packets triggers use-after-free in qfq_dequeue() due to the incorrect .peek handler of sch_plug and lack of error checking in agg_dequeue(). We recommend upgrading past commit 8fc134fee27f2263988ae38920bc03da416b03d8.

Overview

CVE ID
CVE-2023-4921

Assigner
Google

Vulnerability Status
PUBLISHED

Published Version
2023-09-12T19:45:19.367Z

Last Modified Date
2023-09-12T19:45:19.367Z

Weakness Enumerations

CWE	URL
CWE-416	http://cwe.mitre.org/data/definitions/416.html

References

Reference URL	Reference Tags
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8fc134fee27f2263988ae38920bc03da416b03d8	patch
https://kernel.dance/8fc134fee27f2263988ae38920bc03da416b03d8
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2023-4921
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4921

History

Created	Old Value	New Value	Data Type	Notes
2024-06-24 19:51:23				Added to TrackCVE