Bug 2348095 (CVE-2022-49343)

Summary: CVE-2022-49343 kernel: ext4: avoid cycles in directory h-tree
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-02-26 03:17:27 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ext4: avoid cycles in directory h-tree

A maliciously corrupted filesystem can contain cycles in the h-tree
stored inside a directory. That can easily lead to the kernel corrupting
tree nodes that were already verified under its hands while doing a node
split and consequently accessing unallocated memory. Fix the problem by
verifying traversed block numbers are unique.
Comment 1 Avinash Hanwate 2025-02-26 19:34:46 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022641-CVE-2022-49343-bddc@gregkh/T
Comment 5 Avinash Hanwate 2025-02-27 18:44:59 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022641-CVE-2022-49343-bddc@gregkh/T