CVE-2026-53272

Last refreshed2026-10-23

Status: UPDATED | Advisory ID: CVE-2026-53272

Key Details

CVE	CVE-2026-53272
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-21
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:

erofs: fix use-after-free on sbi->sync_decompress

z_erofs_decompress_kickoff() can race with filesystem unmount, causing

a use-after-free on sbi->sync_decompress.

When I/O completes, z_erofs_endio() calls z_erofs_decompress_kickoff()

to queue z_erofs_decompressqueue_work() asynchronously. Then, after all

folios are unlocked, unmount workflow can proceed and sbi will be freed

before accessing to sbi->sync_decompress.

Thread (unmount) I/O completion kworker

queue_work

z_erofs_decompressqueue_work

(all folios are unlocked)

cleanup_mnt

erofs_kill_sb

erofs_sb_free

kfree(sbi)

access sbi->sync_decompress // UAF!! (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-53272
CVE	https://www.cve.org/CVERecord?id=CVE-2026-53272

Source

Reference

NVD

CVE