CVE-2023-4622

[Support]

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 (or backported equivalents).