CVE-2026-23408
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 }…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.18%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 ")
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.18% probability · 8th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-415
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/18b5233e860c294a847ee07869d93c0b8673a54bPatch
- https://git.kernel.org/stable/c/35f4caec1352054b9a61cfdf2bf1898073637aa0Patch
- https://git.kernel.org/stable/c/55ef2af7490aaf72f8ffe11ec44c6bcb7eb2162aPatch
- https://git.kernel.org/stable/c/5df0c44e8f5f619d3beb871207aded7c78414502Patch
- https://git.kernel.org/stable/c/7998ab3010d2317643f91828f1853d954ef31387Patch
- https://git.kernel.org/stable/c/86feeccd6b93ed94bd6655f30de80f163f8d5a45Patch
- https://git.kernel.org/stable/c/c053ae381ce227577567d1ef10090ce7506d7a28Patch
- https://git.kernel.org/stable/c/c6347a2116ecccb8fd9ee4ebc75ae41d1d7ef689Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.