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CVE Vulnerability Details :
CVE-2026-23403
PUBLISHED
More InfoOfficial Page
Assigner-Linux
Assigner Org ID-416baaa9-dc9f-4396-8d5f-8c081fb06d67
View Known Exploited Vulnerability (KEV) details
Published At-01 Apr, 2026 | 08:36
Updated At-11 May, 2026 | 22:06
Rejected At-
▼CVE Numbering Authority (CNA)
apparmor: fix memory leak in verify_header

In 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.

Affected Products
Vendor
Linux Kernel Organization, IncLinux
Product
Linux
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Program Files
  • security/apparmor/policy_unpack.c
Default Status
unaffected
Versions
Affected
  • From dd51c84857630e77c139afe4d9bba65fc051dc3f before 9d678eb0fe55c9195d9a253e8c5b82a87b930737 (git)
  • From dd51c84857630e77c139afe4d9bba65fc051dc3f before 6b79abcb3c985e153fcf9d395e1d4336081aabc2 (git)
  • From dd51c84857630e77c139afe4d9bba65fc051dc3f before bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557 (git)
  • From dd51c84857630e77c139afe4d9bba65fc051dc3f before 663ce34786e759ebcbeb3060685c20bcc886d51a (git)
  • From dd51c84857630e77c139afe4d9bba65fc051dc3f before 786e2c2a87d9c505f33321d1fd23a176aa8ddeb1 (git)
  • From dd51c84857630e77c139afe4d9bba65fc051dc3f before 4f0889f2df1ab99224a5e1ac4e20437eea5fe38e (git)
  • From dd51c84857630e77c139afe4d9bba65fc051dc3f before 42fd831abfc15d0643c14688f0522556b347e7e6 (git)
  • From dd51c84857630e77c139afe4d9bba65fc051dc3f before e38c55d9f834e5b848bfed0f5c586aaf45acb825 (git)
Vendor
Linux Kernel Organization, IncLinux
Product
Linux
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Program Files
  • security/apparmor/policy_unpack.c
Default Status
affected
Versions
Affected
  • 3.12
Unaffected
  • From 0 before 3.12 (semver)
  • From 5.10.253 through 5.10.* (semver)
  • From 5.15.203 through 5.15.* (semver)
  • From 6.1.169 through 6.1.* (semver)
  • From 6.6.130 through 6.6.* (semver)
  • From 6.12.77 through 6.12.* (semver)
  • From 6.18.18 through 6.18.* (semver)
  • From 6.19.8 through 6.19.* (semver)
  • From 7.0 through * (original_commit_for_fix)
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://git.kernel.org/stable/c/9d678eb0fe55c9195d9a253e8c5b82a87b930737
N/A
https://git.kernel.org/stable/c/6b79abcb3c985e153fcf9d395e1d4336081aabc2
N/A
https://git.kernel.org/stable/c/bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557
N/A
https://git.kernel.org/stable/c/663ce34786e759ebcbeb3060685c20bcc886d51a
N/A
https://git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1
N/A
https://git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38e
N/A
https://git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6
N/A
https://git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825
N/A
Hyperlink: https://git.kernel.org/stable/c/9d678eb0fe55c9195d9a253e8c5b82a87b930737
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/6b79abcb3c985e153fcf9d395e1d4336081aabc2
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/663ce34786e759ebcbeb3060685c20bcc886d51a
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38e
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825
Resource: N/A
Details not found