apparmor: fix race between freeing data and fs accessing it

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Summary

CVECVE-2026-23411
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-01 09:16:17 UTC
Updated2026-04-18 09:16:25 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: apparmor: fix race between freeing data and fs accessing it AppArmor was putting the reference to i_private data on its end after removing the original entry from the file system. However the inode can aand does live beyond that point and it is possible that some of the fs call back functions will be invoked after the reference has been put, which results in a race between freeing the data and accessing it through the fs. While the rawdata/loaddata is the most likely candidate to fail the race, as it has the fewest references. If properly crafted it might be possible to trigger a race for the other types stored in i_private. Fix this by moving the put of i_private referenced data to the correct place which is during inode eviction.

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: 0.000130000 probability, percentile 0.023950000 (date 2026-04-21)

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 c961ee5f21b202dea60b63eeef945730d92e46a6 a92c5e5086a87d082696245a8607666da3d80554 git Not specified
CNA Linux Linux affected c961ee5f21b202dea60b63eeef945730d92e46a6 667df93769c02ff581c77d2d8f162147e719c557 git Not specified
CNA Linux Linux affected c961ee5f21b202dea60b63eeef945730d92e46a6 3ddb961d2929bbb3204a2bba21b5d8153cd3f7cc git Not specified
CNA Linux Linux affected c961ee5f21b202dea60b63eeef945730d92e46a6 ae10787d955fb255d381e0d5589451dd72c614b1 git Not specified
CNA Linux Linux affected c961ee5f21b202dea60b63eeef945730d92e46a6 eecce026399917f6efa532c56bc7a3e9dd6ee68b git Not specified
CNA Linux Linux affected c961ee5f21b202dea60b63eeef945730d92e46a6 13bc2772414d68e94e273dea013181a986948ddf git Not specified
CNA Linux Linux affected c961ee5f21b202dea60b63eeef945730d92e46a6 2a732ed26fbd048e7925d227af8cf9ea43fb5cc9 git Not specified
CNA Linux Linux affected c961ee5f21b202dea60b63eeef945730d92e46a6 8e135b8aee5a06c52a4347a5a6d51223c6f36ba3 git Not specified
CNA Linux Linux affected 4.13 Not specified
CNA Linux Linux unaffected 4.13 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 6.1.169 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.130 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.77 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.18 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.8 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/8e135b8aee5a06c52a4347a5a6d51223c6f36ba3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/13bc2772414d68e94e273dea013181a986948ddf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a92c5e5086a87d082696245a8607666da3d80554 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ae10787d955fb255d381e0d5589451dd72c614b1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/eecce026399917f6efa532c56bc7a3e9dd6ee68b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3ddb961d2929bbb3204a2bba21b5d8153cd3f7cc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/667df93769c02ff581c77d2d8f162147e719c557 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2a732ed26fbd048e7925d227af8cf9ea43fb5cc9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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