CVE-2024-0443
MEDIUM severity · CVSS 5.5 · CWE-402
5.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products we track (3)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://access.redhat.com/errata/RHSA-2023:6583
- https://access.redhat.com/errata/RHSA-2023:7077Advisory
- https://access.redhat.com/errata/RHSA-2023:7370
- https://access.redhat.com/security/cve/CVE-2024-0443Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2257968Advisory
- https://lore.kernel.org/linux-block/20221215033132.230023-3-longman@redhat.com/