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CVE-2026-53167

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: fuse: limit FUSE_NOTIFY_RETRIEVE to uptodate folios FUSE_NOTIFY_RETRIEVE must be limited to uptodate folios; !uptodate folios c…

Published Jun 25, 2026CWE-908EPSS 0.13%

Overview

CVE-2026-53167 is a medium-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

fuse: limit FUSE_NOTIFY_RETRIEVE to uptodate folios

FUSE_NOTIFY_RETRIEVE must be limited to uptodate folios; !uptodate folios

can contain uninitialized data.

Since FUSE_NOTIFY_RETRIEVE is intended to only return data that is already

in the page cache and not wait for data from the FUSE daemon, treat

!uptodate folios as if they weren't present.

This only has security impact on systems that don't enable automatic

zero-initialization of all page allocations via

CONFIG_INIT_ON_ALLOC_DEFAULT_ON or init_on_alloc=1.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/1fb8735a3a4d894f8c1f90b741a3ab1d3817f9bdRefgit.kernel.org/stable/c/4e14f29473eda18fb2af082dd2fd4c12139862cdRefgit.kernel.org/stable/c/4e3d1b2c48ca6c55f1e9ca7f8dccc76f120f276cRefgit.kernel.org/stable/c/56763afa013444a9d84ca1b74e4b7130942177baRefgit.kernel.org/stable/c/651801d75ad0897dbd331b3cc6a4da3e78f60d42Refgit.kernel.org/stable/c/68a9282d5ea5b8780d59122505ad633e6daede90Refgit.kernel.org/stable/c/8bef2f840b43e0879478fe3aaa9ff2f0b80798a5Refgit.kernel.org/stable/c/feafe8ccb1584254f59fbd4946d6ca7ef1e3e99cRefproject-zero.issues.chromium.org/issues/514653451

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53167?

CVE-2026-53167 is a medium-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-53167?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-53167?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-53167?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53167 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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