CVE-2026-80929

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-80929

Key Details

CVE	CVE-2026-80929
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:

sysctl: move the "cad_pid" entry from pid_table[] to kern_reboot_table[]

cad_pid is global, and kill_cad_pid() is only used in the root namespace.

However, due to pid_table_root_permissions(), a non-root user can unshare

pid/user namespaces and modify it from the child namespace. This makes no

sense and is simply wrong.

Move it to kern_reboot_table[] where it logically belongs; this ensures

that only GLOBAL_ROOT_UID can read/modify this sysctl.

Note that this patch doesn't preserve "#ifdef CONFIG_PROC_SYSCTL" around

the "cad_pid"; CONFIG_PROC_SYSCTL selects CONFIG_SYSCTL, so it is always

set when kern_reboot_table[] is compiled. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-80929
CVE	https://www.cve.org/CVERecord?id=CVE-2026-80929

Source

Reference

NVD

CVE