CVE-2026-23403

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.

Score

CVSS 3.1 5.5 Medium

Status

Analyzed - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-04-01

Last modified

2026-05-11

Weaknesses

CWE-401

Affected products

• Linux Kernel (Linux)

References

• https://git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6
• https://git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38e
• https://git.kernel.org/stable/c/663ce34786e759ebcbeb3060685c20bcc886d51a
• https://git.kernel.org/stable/c/6b79abcb3c985e153fcf9d395e1d4336081aabc2
• https://git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1
• https://git.kernel.org/stable/c/9d678eb0fe55c9195d9a253e8c5b82a87b930737
• https://git.kernel.org/stable/c/bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557
• https://git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825