Tracker / CVE-2023-4622
CVE-2023-4622
High 7.8
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).
Affected products and versions
| debian | debian_linux |
|---|---|
| linux | linux_kernel · 4.15 → 4.19.293 |
| linux | linux_kernel · 4.2 → 4.14.324 |
| linux | linux_kernel · 4.20 → 5.4.255 |
| linux | linux_kernel · 5.11 → 5.15.128 |
| linux | linux_kernel · 5.16 → 6.1.47 |
| linux | linux_kernel · 5.5 → 5.10.192 |
| linux | linux_kernel · 6.2 → 6.4.12 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.