CVE-2026-23403apparmor: fix memory leak in verify_header
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- May 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from dd51c84857630e77c139afe4d9bba65fc051dc3f before 9d678eb0fe55c9195d9a253e8c5b82a87b930737; from dd51c84857630e77c139afe4d9bba65fc051dc3f before 6b79abcb3c985e153fcf9d395e1d4336081aabc2; from dd51c84857630e77c139afe4d9bba65fc051dc3f before bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557; from dd51c84857630e77c139afe4d9bba65fc051dc3f before 663ce34786e759ebcbeb3060685c20bcc886d51a; from dd51c84857630e77c139afe4d9bba65fc051dc3f before 786e2c2a87d9c505f33321d1fd23a176aa8ddeb1; from dd51c84857630e77c139afe4d9bba65fc051dc3f before 4f0889f2df1ab99224a5e1ac4e20437eea5fe38e; from dd51c84857630e77c139afe4d9bba65fc051dc3f before 42fd831abfc15d0643c14688f0522556b347e7e6; from dd51c84857630e77c139afe4d9bba65fc051dc3f before e38c55d9f834e5b848bfed0f5c586aaf45acb825 | CNA record |
linux linux_kernel linux:linux_kernel | from 3.12.1 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.169; from 6.2 before 6.6.130; from 6.7 before 6.12.77; from 6.13 before 6.18.18; from 6.19 before 6.19.8; 3.12; and 7 more ranges | NVD |
References
- https://git.kernel.org/stable/c/9d678eb0fe55c9195d9a253e8c5b82a87b930737patch
- https://git.kernel.org/stable/c/6b79abcb3c985e153fcf9d395e1d4336081aabc2patch
- https://git.kernel.org/stable/c/bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557patch
- https://git.kernel.org/stable/c/663ce34786e759ebcbeb3060685c20bcc886d51apatch
- https://git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1patch
- https://git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38epatch
- https://git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6patch
- https://git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.