CVE-2024-26832 Affecting cluster-md-kmp-default package, versions <6.4.0-150600.23.7.3
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Test your applications- Snyk ID SNYK-SLES156-CLUSTERMDKMPDEFAULT-7714000
- published 20 Aug 2024
- disclosed 25 Jun 2024
Introduced: 25 Jun 2024
CVE-2024-26832 Open this link in a new tabHow to fix?
Upgrade SLES:15.6 cluster-md-kmp-default to version 6.4.0-150600.23.7.3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream cluster-md-kmp-default package and not the cluster-md-kmp-default package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
mm: zswap: fix missing folio cleanup in writeback race path
In zswap_writeback_entry(), after we get a folio from __read_swap_cache_async(), we grab the tree lock again to check that the swap entry was not invalidated and recycled. If it was, we delete the folio we just added to the swap cache and exit.
However, __read_swap_cache_async() returns the folio locked when it is newly allocated, which is always true for this path, and the folio is ref'd. Make sure to unlock and put the folio before returning.
This was discovered by code inspection, probably because this path handles a race condition that should not happen often, and the bug would not crash the system, it will only strand the folio indefinitely.
References
- https://www.suse.com/security/cve/CVE-2024-26832.html
- https://bugzilla.suse.com/1223007
- https://git.kernel.org/stable/c/14f1992430ef9e647b02aa8ca12c5bcb9a1dffea
- https://git.kernel.org/stable/c/6156277d1b26cb3fdb6fcbf0686ab78268571644
- https://git.kernel.org/stable/c/e2891c763aa2cff74dd6b5e978411ccf0cf94abe
- https://git.kernel.org/stable/c/e3b63e966cac0bf78aaa1efede1827a252815a1d