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CVE-2026-46057

3.3 · LOW

In the Linux kernel, the following vulnerability has been resolved: landlock: Fix LOG_SUBDOMAINS_OFF inheritance across fork() hook_cred_transfer() only copies the Landlock security blob when the…

Published May 27, 2026EPSS 0.16%

Overview

CVE-2026-46057 is a low-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 3.3 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. 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:

landlock: Fix LOG_SUBDOMAINS_OFF inheritance across fork()

hook_cred_transfer() only copies the Landlock security blob when the

source credential has a domain. This is inconsistent with

landlock_restrict_self() which can set LOG_SUBDOMAINS_OFF on a

credential without creating a domain (via the ruleset_fd=-1 path): the

field is committed but not preserved across fork() because the child's

prepare_creds() calls hook_cred_transfer() which skips the copy when

domain is NULL.

This breaks the documented use case where a process mutes subdomain logs

before forking sandboxed children: the children lose the muting and

their domains produce unexpected audit records.

Fix this by unconditionally copying the Landlock credential blob.

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/1c513b8a00df13d231021e74ad92babb3fedf64aRefgit.kernel.org/stable/c/2fcde49092aac55d5beef43fdd3633217672f7d1Refgit.kernel.org/stable/c/874c8f83826c95c62c21d9edfe9ef43e5c346724

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46057?

CVE-2026-46057 is a low-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 3.3 (LOW).

How severe is CVE-2026-46057?

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-46057?

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-2026-46057?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46057 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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