apparmor: fix memory leak in verify_header

MITRE NVD CVE.ORG Print: PDF PDF

Summary

CVECVE-2026-23403
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-01 09:16:15 UTC
Updated2026-04-01 14:23:37 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: apparmor: fix memory leak in verify_header The function sets `*ns = NULL` on every call, leaking the namespace string allocated in previous iterations when multiple profiles are unpacked. This also breaks namespace consistency checking since *ns is always NULL when the comparison is made. Remove the incorrect assignment. The caller (aa_unpack) initializes *ns to NULL once before the loop, which is sufficient.

Risk And Classification

EPSS: 0.000180000 probability, percentile 0.045290000 (date 2026-04-01)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected dd51c84857630e77c139afe4d9bba65fc051dc3f 663ce34786e759ebcbeb3060685c20bcc886d51a git Not specified
CNA Linux Linux affected dd51c84857630e77c139afe4d9bba65fc051dc3f 786e2c2a87d9c505f33321d1fd23a176aa8ddeb1 git Not specified
CNA Linux Linux affected dd51c84857630e77c139afe4d9bba65fc051dc3f 4f0889f2df1ab99224a5e1ac4e20437eea5fe38e git Not specified
CNA Linux Linux affected dd51c84857630e77c139afe4d9bba65fc051dc3f 42fd831abfc15d0643c14688f0522556b347e7e6 git Not specified
CNA Linux Linux affected dd51c84857630e77c139afe4d9bba65fc051dc3f e38c55d9f834e5b848bfed0f5c586aaf45acb825 git Not specified
CNA Linux Linux affected 3.12 Not specified
CNA Linux Linux unaffected 3.12 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-rc4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/663ce34786e759ebcbeb3060685c20bcc886d51a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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