CVE-2024-0443 (GCVE-0-2024-0443)
Vulnerability from cvelistv5 – Published: 2024-01-11 23:30 – Updated: 2025-11-07 13:08
VLAI?
Title
Kernel: blkio memory leakage due to blkcg and some blkgs are not freed after they are made offline.
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.
Severity ?
5.5 (Medium)
CWE
- CWE-402 - Transmission of Private Resources into a New Sphere ('Resource Leak')
Assigner
References
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Impacted products
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Affected:
0 , < 6.4-rc7
(semver)
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Credits
This issue was discovered by Jay Shin (Red Hat).
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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