mm: list_lru: fix UAF for memory cgroup
In the Linux kernel, the following vulnerability has been resolved: mm: list_lru: fix UAF for memory cgroup The mem_cgroup_from_slab_obj() is supposed to be called under rcu lock or cgroup_mutex or others which could prevent returned memcg from being freed. Fix it by adding missing rcu read lock. Found by code inspection. [[email protected]: only grab rcu lock when necessary, per Vlastimil]
02 / AFFECTED SOFTWARE
Affected packages
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: mm: list_lru: fix UAF for memory cgroup The mem_cgroup_from_slab_obj() is supposed to be called under rcu lock or cgroup_mutex or others which could prevent returned memcg from being freed. Fix it by adding missing rcu read lock. Found by code inspection. [[email protected]: only grab rcu lock when necessary, per Vlastimil]
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/4589f77c18dd98b65f45617b6d1e95313cf6fcab
- https://git.kernel.org/stable/c/5161b48712dcd08ec427c450399d4d1483e21dea
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43888.json
- https://nvd.nist.gov/vuln/detail/CVE-2024-43888