Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: selinux: use sk blob accessor in socket permission helpers SELinux socket state lives in the composite LSM socket blob. sock_has_perm() and nlmsg_sock_has_extended_perms() currently dereference sk->sk_security directly, which assumes the SELinux socket blob is at offset zero. In stacked configurations that assumption does not hold. If another LSM allocates socket blob storage before SELinux, these helpers may read the wrong blob and feed invalid SID and class values into AVC checks. Use selinux_sock() instead of accessing sk->sk_security directly.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.13, < 6.18.30 |
References
- https://git.kernel.org/stable/c/032e70aff025d7c519af9ab791cd084380619263Patch
- https://git.kernel.org/stable/c/7eca71f57f194c1638ebb7f4097d6be8fd04c101Patch
- https://git.kernel.org/stable/c/d350fef4bc2467fe1bce15f7a20fe60e01ce41adPatch
FAQ
What is CVE-2026-46104?
CVE-2026-46104 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: selinux: use sk blob accessor in socket permission helpers SELinux socket state lives in the composite LSM socket blob. sock_has_...
How severe is CVE-2026-46104?
CVE-2026-46104 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-46104?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.