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CVE-2026-53167

kernel: fuse: limit FUSE_NOTIFY_RETRIEVE to uptodate folios

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · June 25, 2026

Updated · July 7, 2026

Description

A flaw was found in the Linux kernel's FUSE (Filesystem in Userspace) component. The FUSE_NOTIFY_RETRIEVE operation did not properly restrict access to up-to-date folios, potentially allowing the exposure of uninitialized data from the page cache. This information disclosure vulnerability could allow an attacker to access sensitive information. This issue primarily affects systems where automatic zero-initialization of page allocations is not enabled.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-908 · Use of Uninitialized Resource