Vulnerability 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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.15, < 6.18.27 |
References
- https://git.kernel.org/stable/c/1c513b8a00df13d231021e74ad92babb3fedf64aPatch
- https://git.kernel.org/stable/c/2fcde49092aac55d5beef43fdd3633217672f7d1Patch
- https://git.kernel.org/stable/c/874c8f83826c95c62c21d9edfe9ef43e5c346724Patch
FAQ
What is CVE-2026-46057?
CVE-2026-46057 is a vulnerability with a CVSS score of 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 so...
How severe is CVE-2026-46057?
CVE-2026-46057 has been rated LOW with a CVSS base score of 3.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-46057?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.