exfat: fix the infinite loop in exfat_readdir()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-57940
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-01-21 13:15:08 UTC
Updated2026-05-12 13:16:24 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-835

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected ca06197382bde0a3bc20215595d1c9ce20c6e341 d8cfbb8723bd3d3222f360227a1cc15227189ca6 git Not specified
CNA Linux Linux affected ca06197382bde0a3bc20215595d1c9ce20c6e341 28c21f0ac5293a4bf19b3e0e32005d6dd31a6c17 git Not specified
CNA Linux Linux affected ca06197382bde0a3bc20215595d1c9ce20c6e341 31beabd0f47f8c3ed9965ba861c9e5b252d4920a git Not specified
CNA Linux Linux affected ca06197382bde0a3bc20215595d1c9ce20c6e341 dc1d7afceb982e8f666e70a582e6b5aa806de063 git Not specified
CNA Linux Linux affected ca06197382bde0a3bc20215595d1c9ce20c6e341 d9ea94f5cd117d56e573696d0045ab3044185a15 git Not specified
CNA Linux Linux affected ca06197382bde0a3bc20215595d1c9ce20c6e341 fee873761bd978d077d8c55334b4966ac4cb7b59 git Not specified
CNA Linux Linux affected 5.7 Not specified
CNA Linux Linux unaffected 5.7 semver Not specified
CNA Linux Linux unaffected 5.10.234 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.177 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.125 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.72 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.10 6.12.* semver Not specified
CNA Linux Linux unaffected 6.13 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - BIOS affected * custom Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-503939.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/d9ea94f5cd117d56e573696d0045ab3044185a15 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/03/msg00002.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/fee873761bd978d077d8c55334b4966ac4cb7b59 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/31beabd0f47f8c3ed9965ba861c9e5b252d4920a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/03/msg00001.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/d8cfbb8723bd3d3222f360227a1cc15227189ca6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/28c21f0ac5293a4bf19b3e0e32005d6dd31a6c17 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dc1d7afceb982e8f666e70a582e6b5aa806de063 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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