CVE-2026-53388

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-53388

Key Details

CVE	CVE-2026-53388
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:

fuse: re-lock request before replacing page cache folio

fuse_try_move_folio() unlocks the request on entry but does not

re-lock it on the success path. This means fuse_chan_abort() can end the

request and free the fuse_io_args (eg fuse_readpages_end()) while the

subsequent copy chain logic after fuse_try_move_folio() accesses the

fuse_io_args, leading to use-after-free issues.

Fix this by calling lock_request() before replace_page_cache_folio().

This ensures the request is locked on the success path which will

prevent the fuse_io_args from being freed while the later copying logic

runs, and also ensures that the ap->folios[i]->mapping is never null

since ap->folios[i] will always point to the newfolio after

replace_page_cache_folio(). (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-53388
CVE	https://www.cve.org/CVERecord?id=CVE-2026-53388

Source

Reference

NVD

CVE