Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ead9079f75696a028aea8860787770c80eddb8f9 before 2fcde49092aac55d5beef43fdd3633217672f7d1; affected ead9079f75696a028aea8860787770c80eddb8f9 before 1c513b8a00df13d231021e74ad92babb3fedf64a; affected ead9079f75696a028aea8860787770c80eddb8f9 before 874c8f83826c95c62c21d9edfe9ef43e5c346724 |
| Linux / Linux | affected 6.15; unaffected 0 before 6.15; unaffected 6.18.27 through 6.18.*; unaffected 7.0.4 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.