CVE-2026-80928
CVE CVE-2026-80928EUVD EUVD-2026-76251Published 2026-09-11T19:42:04.000ZLast changed 2026-09-14T11:58:55.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: smack: fix cred UAF in smack_file_send_sigiotask() When inspecting the credentials of another task, objective credentials (->real_cred, accessed with __task_cred()) must always be used. Accessing ->cred on a non-current task is forbidden unless that task is being created or destroyed; a task is allowed to change its own ->cred pointer with no synchronization, and changing ->cred should only affect the current syscall. smack_file_send_sigiotask() was accessing both sets of credentials: First tsk->cred, then __task_cred(tsk). Fix it, always access the objective credentials here. I have tested that this bug can lead to a KASAN-reported UAF of struct cred in smack_file_send_sigiotask(), and that this fix prevents the race.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 6.1.188; patch: 6.12.109; patch: 7.3-rc1; patch: 0; 3b11a1decef07c19443d24ae926982bc8ec9f4c0 <ed64aa505875a3b4defd504ee8e59e1949246a62; 2.6.29; patch: 7.2.4; 3b11a1decef07c19443d24ae926982bc8ec9f4c0 <b791401bf389a1546a830d2b381ca60fe94c7870; patch: 5.15.221; 3b11a1decef07c19443d24ae926982bc8ec9f4c0 <7c7fe043f3099d0d35002b248967f75e55345b93; 3b11a1decef07c19443d24ae926982bc8ec9f4c0 <f9c7b1f2b9d8f4176d2632743f51400855978ace; 3b11a1decef07c19443d24ae926982bc8ec9f4c0 <a512366d84e134a9eefc2cc40eeb6e80e2ec162c; 3b11a1decef07c19443d24ae926982bc8ec9f4c0 <b5bcf3adfa27279da4401ab8f1e1a706601a92be; patch: 6.18.50; patch: 6.6.157; 3b11a1decef07c19443d24ae926982bc8ec9f4c0 <fedc88e38ce979a720cd2de042578cb5df3dc8de
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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