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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
ead9079f75696a028aea8860787770c80eddb8f9 to < 2fcde49092aac55d5beef43fdd3633217672f7d1affectedead9079f75696a028aea8860787770c80eddb8f9 to < 1c513b8a00df13d231021e74ad92babb3fedf64aaffectedead9079f75696a028aea8860787770c80eddb8f9 to < 874c8f83826c95c62c21d9edfe9ef43e5c346724affected
Linux Linux
Default version status: affected
6.15affected0 to < 6.15unaffected6.18.27 to ≤ 6.18.*unaffected7.0.4 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected