High severity7.8NVD Advisory· Published Apr 1, 2026· Updated Apr 24, 2026
CVE-2026-23408
CVE-2026-23408
Description
In the Linux kernel, the following vulnerability has been resolved:
apparmor: Fix double free of ns_name in aa_replace_profiles()
if ns_name is NULL after 1071 error = aa_unpack(udata, &lh, &ns_name);
and if ent->ns_name contains an ns_name in 1089 } else if (ent->ns_name) {
then ns_name is assigned the ent->ns_name 1095 ns_name = ent->ns_name;
however ent->ns_name is freed at 1262 aa_load_ent_free(ent);
and then again when freeing ns_name at 1270 kfree(ns_name);
Fix this by NULLing out ent->ns_name after it is transferred to ns_name
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
10cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 9 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=5.5.1,<5.10.253
- cpe:2.3:o:linux:linux_kernel:5.5:-:*:*:*:*:*:*
- 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/18b5233e860c294a847ee07869d93c0b8673a54bnvdPatch
- git.kernel.org/stable/c/35f4caec1352054b9a61cfdf2bf1898073637aa0nvdPatch
- git.kernel.org/stable/c/55ef2af7490aaf72f8ffe11ec44c6bcb7eb2162anvdPatch
- git.kernel.org/stable/c/5df0c44e8f5f619d3beb871207aded7c78414502nvdPatch
- git.kernel.org/stable/c/7998ab3010d2317643f91828f1853d954ef31387nvdPatch
- git.kernel.org/stable/c/86feeccd6b93ed94bd6655f30de80f163f8d5a45nvdPatch
- git.kernel.org/stable/c/c053ae381ce227577567d1ef10090ce7506d7a28nvdPatch
- git.kernel.org/stable/c/c6347a2116ecccb8fd9ee4ebc75ae41d1d7ef689nvdPatch
News mentions
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