CVE-2023-4622
Use-after-free in Linux kernel's af_unix component
HIGH 7.0EPSS 0.6%
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
- Linux · Kernel
- CVSS v3.1 NVD
- 7.0 HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS v3.1 GOOGLE
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.61% chance of exploitation in the next 30 days, 48th percentile
- Published
- 2023-09-06
- Updated
- 2026-09-17
Proof-of-concept exploits (1)
- 0range1337/CVE-CVE-2023-46221★ · 2024-06-26
Exploit collections (2)
- linux/kernelctf/CVE-2023-4622_cosgoogle/security-research
- linux/kernelctf/CVE-2023-4622_ltsgoogle/security-research
Security advisories
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.1.y&id…
- https://kernel.dance/790c2f9d15b594350ae9bca7b236f2b1859de02c
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1…
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- https://www.debian.org/security/2023/dsa-5492