Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.12.1, < 5.10.253 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6Patch
- https://git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38ePatch
- https://git.kernel.org/stable/c/663ce34786e759ebcbeb3060685c20bcc886d51aPatch
- https://git.kernel.org/stable/c/6b79abcb3c985e153fcf9d395e1d4336081aabc2Patch
- https://git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1Patch
- https://git.kernel.org/stable/c/9d678eb0fe55c9195d9a253e8c5b82a87b930737Patch
- https://git.kernel.org/stable/c/bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557Patch
- https://git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825Patch
FAQ
What is CVE-2026-23403?
CVE-2026-23403 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...
How severe is CVE-2026-23403?
CVE-2026-23403 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-23403?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.