CVE-2026-53388

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().

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0223f452532d9cd8a5e87c45de828fd93c99bd25	Patch
https://git.kernel.org/stable/c/030fe3e9d8abdee303dd7e9e42f45082d382a407	Patch
https://git.kernel.org/stable/c/46473ddccdc5065033e397d6e62c280dbcd3d9c2	Patch
https://git.kernel.org/stable/c/5927b43a4f8d89e86930f524bf63e9c7e66f61b4	Patch
https://git.kernel.org/stable/c/7c18691e0cfda29672f79bafde8abdb7710674f6	Patch
https://git.kernel.org/stable/c/a078484921052d0badd827fcc2770b5cfc1d4120	Patch
https://git.kernel.org/stable/c/af2892249d982a1c036ca456cc135374e68b6677	Patch
https://git.kernel.org/stable/c/e28db6ac4792d065ab32565fd9f0a2361c3d4666	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2026-07-19 12:16

Updated : 2026-08-17 05:17

NVD link : CVE-2026-53388

Mitre link : CVE-2026-53388

CVE.ORG link : CVE-2026-53388

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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