5.5

CVE-2024-57940

exfat: fix the infinite loop in exfat_readdir()

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.7 < 6.1.125
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.72
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.10
Linux ≫ Linux Kernel Version6.13 Updaterc1
Linux ≫ Linux Kernel Version6.13 Updaterc2
Linux ≫ Linux Kernel Version6.13 Updaterc3
Linux ≫ Linux Kernel Version6.13 Updaterc4
Linux ≫ Linux Kernel Version6.13 Updaterc5
Linux ≫ Linux Kernel Version6.13 Updaterc6
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.22% 0.12
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')

The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

https://git.kernel.org/stable/c/28c21f0ac5293a4bf19b3e0e32005d6dd31a6c17
https://git.kernel.org/stable/c/31beabd0f47f8c3ed9965ba861c9e5b252d4920a
Patch
https://git.kernel.org/stable/c/d8cfbb8723bd3d3222f360227a1cc15227189ca6
https://git.kernel.org/stable/c/d9ea94f5cd117d56e573696d0045ab3044185a15
Patch
https://git.kernel.org/stable/c/dc1d7afceb982e8f666e70a582e6b5aa806de063
Patch
https://git.kernel.org/stable/c/fee873761bd978d077d8c55334b4966ac4cb7b59
Patch
https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
https://cert-portal.siemens.com/productcert/html/ssa-265688.html
https://cert-portal.siemens.com/productcert/html/ssa-503939.html