ext4: fix infinite loop when replaying fast_commit

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-43828
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-08-17 10:15:08 UTC
Updated2026-05-12 12:17:06 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ext4: fix infinite loop when replaying fast_commit When doing fast_commit replay an infinite loop may occur due to an uninitialized extent_status struct. ext4_ext_determine_insert_hole() does not detect the replay and calls ext4_es_find_extent_range(), which will return immediately without initializing the 'es' variable. Because 'es' contains garbage, an integer overflow may happen causing an infinite loop in this function, easily reproducible using fstest generic/039. This commit fixes this issue by unconditionally initializing the structure in function ext4_es_find_extent_range(). Thanks to Zhang Yi, for figuring out the real problem!

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 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 5ed0496e383cb6de120e56991385dce70bbb87c1 git Not specified
CNA Linux Linux affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 0619f7750f2b178a1309808832ab20d85e0ad121 git Not specified
CNA Linux Linux affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 181e63cd595c688194e07332f9944b3a63193de2 git Not specified
CNA Linux Linux affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 c6e67df64783e99a657ef2b8c834ba2bf54c539c git Not specified
CNA Linux Linux affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 81f819c537d29932e4b9267f02411cbc8b355178 git Not specified
CNA Linux Linux affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 907c3fe532253a6ef4eb9c4d67efb71fab58c706 git Not specified
CNA Linux Linux affected 5.10 Not specified
CNA Linux Linux unaffected 5.10 semver Not specified
CNA Linux Linux unaffected 5.10.224 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.165 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.103 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.44 6.6.* semver Not specified
CNA Linux Linux unaffected 6.10.3 6.10.* semver Not specified
CNA Linux Linux unaffected 6.11 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/0619f7750f2b178a1309808832ab20d85e0ad121 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/181e63cd595c688194e07332f9944b3a63193de2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/81f819c537d29932e4b9267f02411cbc8b355178 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c6e67df64783e99a657ef2b8c834ba2bf54c539c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/907c3fe532253a6ef4eb9c4d67efb71fab58c706 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5ed0496e383cb6de120e56991385dce70bbb87c1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2024/10/msg00003.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
lists.debian.org/debian-lts-announce/2025/01/msg00001.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
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