Use of uninitialized resource in Linux kernel - CVE-2026-53167
Published: June 26, 2026
Vulnerability identifier: #VU135611
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53167
CWE-ID: CWE-908
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to an exposure of uninitialized memory in FUSE_NOTIFY_RETRIEVE in fs/fuse/dev.c when retrieving data from page cache folios. A local user can trigger FUSE_NOTIFY_RETRIEVE on a non-uptodate folio to disclose sensitive information.
This has security impact only on systems that do not enable automatic zero-initialization of page allocations.
How to mitigate CVE-2026-53167
Install security update from vendor's repository.