CWE
835
Advisory Published
Updated

CVE-2024-57940: exfat: fix the infinite loop in exfat_readdir()

First published: Tue Jan 21 2025(Updated: )

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.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel
Linux Linux kernel>=5.7<6.1.125
Linux Linux kernel>=6.2<6.6.72
Linux Linux kernel>=6.7<6.12.10
Linux Linux kernel=6.13-rc1
Linux Linux kernel=6.13-rc2
Linux Linux kernel=6.13-rc3
Linux Linux kernel=6.13-rc4
Linux Linux kernel=6.13-rc5
Linux Linux kernel=6.13-rc6

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