Integer Overflow or Wraparound Affecting kernel package, versions *
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Test your applications- Snyk ID SNYK-CENTOS7-KERNEL-7763886
- published 21 Aug 2024
- disclosed 17 Aug 2024
How to fix?
There is no fixed version for Centos:7 kernel.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix infinite loop when replaying fast_commit
When doing fast_commit replay an infinite loop may occur due to an uninitialized extent_status struct. ext4_ext_determine_insert_hole() does not detect the replay and calls ext4_es_find_extent_range(), which will return immediately without initializing the 'es' variable.
Because 'es' contains garbage, an integer overflow may happen causing an infinite loop in this function, easily reproducible using fstest generic/039.
This commit fixes this issue by unconditionally initializing the structure in function ext4_es_find_extent_range().
Thanks to Zhang Yi, for figuring out the real problem!
References
- https://access.redhat.com/security/cve/CVE-2024-43828
- https://git.kernel.org/stable/c/0619f7750f2b178a1309808832ab20d85e0ad121
- https://git.kernel.org/stable/c/181e63cd595c688194e07332f9944b3a63193de2
- https://git.kernel.org/stable/c/5ed0496e383cb6de120e56991385dce70bbb87c1
- https://git.kernel.org/stable/c/81f819c537d29932e4b9267f02411cbc8b355178
- https://git.kernel.org/stable/c/907c3fe532253a6ef4eb9c4d67efb71fab58c706
- https://git.kernel.org/stable/c/c6e67df64783e99a657ef2b8c834ba2bf54c539c