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.
Does this matter?
Lower severity and a low EPSS score (0.18%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.18% probability · 7th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-401
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.