Medium severity5.5NVD Advisory· Published Apr 1, 2026· Updated Apr 24, 2026
CVE-2026-23403
CVE-2026-23403
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.
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Affected products
10cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 9 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=3.12.1,<5.10.253
- cpe:2.3:o:linux:linux_kernel:3.12:-:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
- (no CPE)
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6nvdPatch
- git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38envdPatch
- git.kernel.org/stable/c/663ce34786e759ebcbeb3060685c20bcc886d51anvdPatch
- git.kernel.org/stable/c/6b79abcb3c985e153fcf9d395e1d4336081aabc2nvdPatch
- git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1nvdPatch
- git.kernel.org/stable/c/9d678eb0fe55c9195d9a253e8c5b82a87b930737nvdPatch
- git.kernel.org/stable/c/bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557nvdPatch
- git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825nvdPatch
News mentions
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