CVE-2026-80928

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-80928

Key Details

CVE	CVE-2026-80928
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-80928
CVE	https://www.cve.org/CVERecord?id=CVE-2026-80928

Source

Reference

NVD

CVE