btrfs: fix chunk map leak in btrfs_map_block() after btrfs_chunk_map_num_copies()

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Summary

CVECVE-2026-43393
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-08 15:16:50 UTC
Updated2026-05-26 14:53:09 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: btrfs: fix chunk map leak in btrfs_map_block() after btrfs_chunk_map_num_copies() Fix a chunk map leak in btrfs_map_block(): if we return early with -EINVAL, we're not freeing the chunk map that we've just looked up.

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

EPSS: 0.000180000 probability, percentile 0.047270000 (date 2026-05-12)

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 0ae653fbec2b9fbc72c65a0c99528990bfb2136d 0e4aaf5a3212b6a469c2489637c29a8e2a5062a5 git Not specified
CNA Linux Linux affected 0ae653fbec2b9fbc72c65a0c99528990bfb2136d 7bdf00ed75c477252578068dba19934cd825f20a git Not specified
CNA Linux Linux affected 0ae653fbec2b9fbc72c65a0c99528990bfb2136d 4f90c5c2698383984102401b1724b0b67da832ab git Not specified
CNA Linux Linux affected 0ae653fbec2b9fbc72c65a0c99528990bfb2136d f15fb3d41543244d1179f423da4a4832a55bc050 git Not specified
CNA Linux Linux affected 6.12 Not specified
CNA Linux Linux unaffected 6.12 semver Not specified
CNA Linux Linux unaffected 6.12.78 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.19 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.9 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/4f90c5c2698383984102401b1724b0b67da832ab 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0e4aaf5a3212b6a469c2489637c29a8e2a5062a5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f15fb3d41543244d1179f423da4a4832a55bc050 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/7bdf00ed75c477252578068dba19934cd825f20a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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