CVE-2026-45861

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-45861

Key Details

CVE	CVE-2026-45861
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-16
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
Classified as	CWE-416 (Use After Free)

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:

gfs2: Fix slab-use-after-free in qd_put

Commit a475c5dd16e5 ("gfs2: Free quota data objects synchronously")

started freeing quota data objects during filesystem shutdown instead of

putting them back onto the LRU list, but it failed to remove these

objects from the LRU list, causing LRU list corruption. This caused

use-after-free when the shrinker (gfs2_qd_shrink_scan) tried to access

already-freed objects on the LRU list.

Fix this by removing qd objects from the LRU list before freeing them in

qd_put().

Initial fix from Deepanshu Kartikey <[email protected]>. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-45861
CVE	https://www.cve.org/CVERecord?id=CVE-2026-45861

Source

Reference

NVD

CVE