ext4: fix invalid free tracking in ext4_xattr_move_to_block()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2023-54062
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-12-24 13:16:07 UTC
Updated2026-10-15 22:17:51 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ext4: fix invalid free tracking in ext4_xattr_move_to_block() In ext4_xattr_move_to_block(), the value of the extended attribute which we need to move to an external block may be allocated by kvmalloc() if the value is stored in an external inode. So at the end of the function the code tried to check if this was the case by testing entry->e_value_inum. However, at this point, the pointer to the xattr entry is no longer valid, because it was removed from the original location where it had been stored. So we could end up calling kvfree() on a pointer which was not allocated by kvmalloc(); or we could also potentially leak memory by not freeing the buffer when it should be freed. Fix this by storing whether it should be freed in a separate variable.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001620000 probability, percentile 0.048920000 (date 2026-10-15)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c7851208abffe5ae4deb01cf48763911dc14fc67 76887be2a96193cd11be818551b8934ecdb3123f git Not specified
CNA Linux Linux affected f5cdc6a7339f250d44d4d469ed7a474ac0d6c7a7 f30f3391d089dc91aef91d08f4b04a6c0df2b067 git Not specified
CNA Linux Linux affected 3b28c799a1334adb5a19f42f03abe0d8cbb05938 ba04d6af5ac440a6d5a2d35dc1d8e2cb0323550a git Not specified
CNA Linux Linux affected d738789ae9ec47d3458a008788f3cdc862ebf0cb 1a8822343e67432b658145d2760a524c884da9d4 git Not specified
CNA Linux Linux affected a6744e14ce7045ab1a728bde9595f62fbd39f1d2 8beaa3cb293a8f7bacf711cf52201d59859dbc40 git Not specified
CNA Linux Linux affected 8b6d06b3be7648b3b0f428558293ddf6e2cb94bf c5fa4eedddd1c8342ce533cb401c0e693e55b4e3 git Not specified
CNA Linux Linux affected d2efaf8c870c7067b8d1779773134f3481cd8f68 a18670395e5f28acddeca037c5e4bd2ea961b70a git Not specified
CNA Linux Linux affected 1e9d62d252812575ded7c620d8fc67c32ff06c16 b2fab1807d26acd1c6115b95b5eddd697d84751b git Not specified
CNA Linux Linux affected 1e9d62d252812575ded7c620d8fc67c32ff06c16 b87c7cdf2bed4928b899e1ce91ef0d147017ba45 git Not specified
CNA Linux Linux affected 4.14.308 4.14.315 semver Not specified
CNA Linux Linux affected 4.19.276 4.19.283 semver Not specified
CNA Linux Linux affected 5.4.235 5.4.243 semver Not specified
CNA Linux Linux affected 5.10.173 5.10.180 semver Not specified
CNA Linux Linux affected 5.15.99 5.15.112 semver Not specified
CNA Linux Linux affected 6.1.16 6.1.29 semver Not specified
CNA Linux Linux affected 6.2.3 6.2.16 semver Not specified
CNA Linux Linux affected 6.3 Not specified
CNA Linux Linux unaffected 6.3 semver Not specified
CNA Linux Linux unaffected 4.14.315 4.14.* semver Not specified
CNA Linux Linux unaffected 4.19.283 4.19.* semver Not specified
CNA Linux Linux unaffected 5.4.243 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.180 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.112 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.29 6.1.* semver Not specified
CNA Linux Linux unaffected 6.2.16 6.2.* semver Not specified
CNA Linux Linux unaffected 6.3.3 6.3.* semver Not specified
CNA Linux Linux unaffected 6.4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/c5fa4eedddd1c8342ce533cb401c0e693e55b4e3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ba04d6af5ac440a6d5a2d35dc1d8e2cb0323550a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b87c7cdf2bed4928b899e1ce91ef0d147017ba45 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8beaa3cb293a8f7bacf711cf52201d59859dbc40 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/76887be2a96193cd11be818551b8934ecdb3123f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a18670395e5f28acddeca037c5e4bd2ea961b70a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f30f3391d089dc91aef91d08f4b04a6c0df2b067 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1a8822343e67432b658145d2760a524c884da9d4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b2fab1807d26acd1c6115b95b5eddd697d84751b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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