CVE-2023-4622
High
Description
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).
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedSep 6, 2023
First seenSep 6, 2023
Weakness typeCWE-416Use after free
How to fix
Update
- linux linux_kernel4.14.324, 4.19.293, 5.4.255, 5.10.192, 5.15.128, 6.1.47, 6.4.12 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.2 ≤ v < 4.14.324, 4.15 ≤ v < 4.19.293, 4.20 ≤ v < 5.4.255, 5.5 ≤ v < 5.10.192, 5.11 ≤ v < 5.15.128, 5.16 ≤ v < 6.1.47, 6.2 ≤ v < 6.4.12 | 4.14.324, 4.19.293, 5.4.255, 5.10.192, 5.15.128, 6.1.47, 6.4.12 |
| debian debian_linux | 10.0, 12.0 | — |
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