CVE-2026-46057 (GCVE-0-2026-46057)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:57 – Updated: 2026-05-27 12:57
VLAI
Title
landlock: Fix LOG_SUBDOMAINS_OFF inheritance across fork()
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ead9079f75696a028aea8860787770c80eddb8f9 , < 2fcde49092aac55d5beef43fdd3633217672f7d1 (git)
Affected: ead9079f75696a028aea8860787770c80eddb8f9 , < 1c513b8a00df13d231021e74ad92babb3fedf64a (git)
Affected: ead9079f75696a028aea8860787770c80eddb8f9 , < 874c8f83826c95c62c21d9edfe9ef43e5c346724 (git)
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Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.18.27 , ≤ 6.18.* (semver)
Unaffected: 7.0.4 , ≤ 7.0.* (semver)
Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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