CVE-2026-64266
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
25/07/2026
Last modified:
30/07/2026
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
fuse: re-lock request before returning from fuse_ref_folio()<br />
<br />
fuse_ref_folio() unlocks the request but does not re-lock it before<br />
returning. fuse_chan_abort() can end the request and the async end<br />
callback (eg fuse_writepage_free()) can free the args while the<br />
subsequent copy chain logic after fuse_ref_folio() accesses them,<br />
leading to use-after-free issues.<br />
<br />
Fix this by locking the request in fuse_ref_folio() before returning.
Impact
Base Score 3.x
7.80
Severity 3.x
HIGH
References to Advisories, Solutions, and Tools
- https://git.kernel.org/stable/c/0e4a5a000123d81234e27a2f8187688cf608f755
- https://git.kernel.org/stable/c/1ca605cfa59377f0143fb35b5b01360f37d1b7c4
- https://git.kernel.org/stable/c/1f9156714592356b4fda57beac7eab9c2a462dd3
- https://git.kernel.org/stable/c/5630da218a45ba80f0aba0846cbe8aa655da122b
- https://git.kernel.org/stable/c/65a1c2551f7e16085acbb54aedde1feaa559ba7a
- https://git.kernel.org/stable/c/b5befa80fdbe287a98480effed9564712924add5
- https://git.kernel.org/stable/c/be353caffa8640f5e25fb3714ce8b0cef5e410e5
- https://git.kernel.org/stable/c/e6aa539720c3d8def69683ed0c07cf9faea4e8be