CVE-2024-57940

exfat: fix the infinite loop in exfat_readdir()

State: Published
Severity: Not scored
Published: Jan 21, 2025
Updated: Oct 15, 2026
Reserved: Jan 19, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

exfat: fix the infinite loop in exfat_readdir()

If the file system is corrupted so that a cluster is linked to itself in the cluster chain, and there is an unused directory entry in the cluster, 'dentry' will not be incremented, causing condition 'dentry < max_dentries' unable to prevent an infinite loop.

This infinite loop causes s_lock not to be released, and other tasks will hang, such as exfat_sync_fs().

This commit stops traversing the cluster chain when there is unused directory entry in the cluster to avoid this infinite loop.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	ca06197382bde0a3bc20215595d1c9ce20c6e341 to before d8cfbb8723bd3d3222f360227a1cc15227189ca6Affected ca06197382bde0a3bc20215595d1c9ce20c6e341 to before 28c21f0ac5293a4bf19b3e0e32005d6dd31a6c17Affected ca06197382bde0a3bc20215595d1c9ce20c6e341 to before 31beabd0f47f8c3ed9965ba861c9e5b252d4920aAffected ca06197382bde0a3bc20215595d1c9ce20c6e341 to before dc1d7afceb982e8f666e70a582e6b5aa806de063Affected ca06197382bde0a3bc20215595d1c9ce20c6e341 to before d9ea94f5cd117d56e573696d0045ab3044185a15Affected ca06197382bde0a3bc20215595d1c9ce20c6e341 to before fee873761bd978d077d8c55334b4966ac4cb7b59Affected
LinuxLinux	5.7Affected before 5.7Not affected 5.10.234 through 5.10.Not affected 5.15.177 through 5.15.Not affected 6.1.125 through 6.1.Not affected 6.6.72 through 6.6.Not affected 6.12.10 through 6.12.*Not affected 6.13 and laterNot affected

Product

Versions

LinuxLinux

ca06197382bde0a3bc20215595d1c9ce20c6e341 to before d8cfbb8723bd3d3222f360227a1cc15227189ca6Affected
ca06197382bde0a3bc20215595d1c9ce20c6e341 to before 28c21f0ac5293a4bf19b3e0e32005d6dd31a6c17Affected
ca06197382bde0a3bc20215595d1c9ce20c6e341 to before 31beabd0f47f8c3ed9965ba861c9e5b252d4920aAffected
ca06197382bde0a3bc20215595d1c9ce20c6e341 to before dc1d7afceb982e8f666e70a582e6b5aa806de063Affected
ca06197382bde0a3bc20215595d1c9ce20c6e341 to before d9ea94f5cd117d56e573696d0045ab3044185a15Affected
ca06197382bde0a3bc20215595d1c9ce20c6e341 to before fee873761bd978d077d8c55334b4966ac4cb7b59Affected

LinuxLinux

5.7Affected
before 5.7Not affected
5.10.234 through 5.10.*Not affected
5.15.177 through 5.15.*Not affected
6.1.125 through 6.1.*Not affected
6.6.72 through 6.6.*Not affected
6.12.10 through 6.12.*Not affected
6.13 and laterNot affected

References

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