CVE-2023-4622

A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation. The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free. We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c.

Affected products

Alt Linux, Almalinux, Astra Linux, Centos, Linuxmint, Linux Kernel, Red Hat, Red Os

Linux Linux Kernel

< 6.1.47

Fix

Available

CVSS 3.1

7.8 HIGH

EPSS

0.5% (44th percentile)

Weakness

CWE-416

NVD status

Modified

Published

2023-09-06

Attack patterns

CAPEC-233