Fiche vulnérabilité
CVE-2023-4622 : faille élevée linux linux kernel (CVSS 7.0)
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).
En bref
- Sévérité
- Élevée (CVSS 7.0)
- Vecteur CVSS
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Exploitation active
- Non signalée par la CISA
- Publication
- 6 sept. 2023
- Dernière mise à jour
- 17 sept. 2026
Produits concernés
- linux linux kernel
- debian debian linux
Références
- Fiche CVE-2023-4622 sur le NVD (NIST)
- packetstormsecurity.com/files/175963/Kernel…
- git.kernel.org/pub/scm/linux/kernel/git/stable/linux…
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux…
- kernel.dance/790c2f9d15b594350ae9bca7b236f2b1859de02c
- lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- debian.org/security/2023/dsa-5492