ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths

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Summary

CVECVE-2026-43066
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-05 16:16:15 UTC
Updated2026-05-29 17:53:12 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths During code review, Joseph found that ext4_fc_replay_inode() calls ext4_get_fc_inode_loc() to get the inode location, which holds a reference to iloc.bh that must be released via brelse(). However, several error paths jump to the 'out' label without releasing iloc.bh: - ext4_handle_dirty_metadata() failure - sync_dirty_buffer() failure - ext4_mark_inode_used() failure - ext4_iget() failure Fix this by introducing an 'out_brelse' label placed just before the existing 'out' label to ensure iloc.bh is always released. Additionally, make ext4_fc_replay_inode() propagate errors properly instead of always returning 0.

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-401

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 0892f12cd49fde5d5db68137923db107f894f3a3 git Not specified
CNA Linux Linux affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 5a63033696e60b5d70816f1d119645ac5b0b0a03 git Not specified
CNA Linux Linux affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 9c90449a9ac2cd1ba540ad2561b8b70c1bfb0a25 git Not specified
CNA Linux Linux affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 ca99cbcc316cdfd2040cc2b13d1426ccb3b3b50b git Not specified
CNA Linux Linux affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 19782b4c793b49a6aa4abbb307ddff3610009d21 git Not specified
CNA Linux Linux affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 f7817ad399d604e8639005d87d148b5ec626ad26 git Not specified
CNA Linux Linux affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 c426231e3d51916e83b6d1ab7ed8a65e83bca5b4 git Not specified
CNA Linux Linux affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 ec0a7500d8eace5b4f305fa0c594dd148f0e8d29 git Not specified
CNA Linux Linux affected 5.10 Not specified
CNA Linux Linux unaffected 5.10 semver Not specified
CNA Linux Linux unaffected 5.10.253 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.203 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.168 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.131 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.80 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.21 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.11 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ec0a7500d8eace5b4f305fa0c594dd148f0e8d29 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c426231e3d51916e83b6d1ab7ed8a65e83bca5b4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0892f12cd49fde5d5db68137923db107f894f3a3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ca99cbcc316cdfd2040cc2b13d1426ccb3b3b50b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9c90449a9ac2cd1ba540ad2561b8b70c1bfb0a25 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f7817ad399d604e8639005d87d148b5ec626ad26 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5a63033696e60b5d70816f1d119645ac5b0b0a03 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/19782b4c793b49a6aa4abbb307ddff3610009d21 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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