CVEvulnerability

CVE-2024-0443

5.5 MEDIUM Published 2024-01-12 Modified 2026-10-26 Official page ↗
Status
Modified
Published
2024-01-12
Last modified
2026-10-26
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-402, CWE-668

Description

A flaw was found in the blkgs destruction path in block/blk-cgroup.c in the Linux kernel, leading to a cgroup blkio memory leakage problem. When a cgroup is being destroyed, cgroup_rstat_flush() is only called at css_release_work_fn(), which is called when the blkcg reference count reaches 0. This circular dependency will prevent blkcg and some blkgs from being freed after they are made offline. This issue may allow an attacker with a local access to cause system instability, such as an out of memory error.

Affected configurations

• linux linux kernel (>= 6.2 < 6.4) • linux linux kernel 6.4 • redhat enterprise linux 8.0 • redhat enterprise linux 9.0 • fedoraproject fedora 39

Related

Weakness · CWE (2)

  • CWE-402 Transmission of Private Resources into a New Sphere weakness
  • CWE-668 Exposure of Resource to Wrong Sphere weakness

References