CVE-2026-46057

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.

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Produits concernés

• Linux
• Linux linux kernel

Scores CVSS

Références

• https://git.kernel.org/stable/c/1c513b8a00df13d231021e74ad92babb3fedf64a Patch
• https://git.kernel.org/stable/c/2fcde49092aac55d5beef43fdd3633217672f7d1 Patch
• https://git.kernel.org/stable/c/874c8f83826c95c62c21d9edfe9ef43e5c346724 Patch

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories