Bug 2307861 (CVE-2024-43888) - CVE-2024-43888 kernel: mm: list_lru: fix UAF for memory cgroup
Summary: CVE-2024-43888 kernel: mm: list_lru: fix UAF for memory cgroup
Keywords:
Status: NEW
Alias: CVE-2024-43888
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2308106
Blocks:
TreeView+ depends on / blocked
 
Reported: 2024-08-26 11:20 UTC by OSIDB Bzimport
Modified: 2024-11-15 10:08 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2024:9315 0 None None None 2024-11-12 09:39:16 UTC

Description OSIDB Bzimport 2024-08-26 11:20:38 UTC 
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.

[songmuchun: only grab rcu lock when necessary, per Vlastimil]
  Link: https://lkml.kernel.org/r/20240801024603.1865-1-songmuchun@bytedance.com
Comment 1 Mauro Matteo Cascella 2024-08-27 10:39:11 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024082659-CVE-2024-43888-5beb@gregkh/T
Comment 2 errata-xmlrpc 2024-11-12 09:39:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:9315 https://access.redhat.com/errata/RHSA-2024:9315
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