Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fscrypt: destroy keyring after security_sb_delete() fscrypt_destroy_keyring() must be called after all potentially-encrypted inodes were evicted; otherwise it cannot safely destroy the keyring. Since inodes that are in-use by the Landlock LSM don't get evicted until security_sb_delete(), this means that fscrypt_destroy_keyring() must be called *after* security_sb_delete(). This fixes a WARN_ON followed by a NULL dereference, only possible if Landlock was being used on encrypted files.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.10.154, < 5.11 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/497ab5d9c7852dfedab2c9de75e41b60e54b7c5dPatch
- https://git.kernel.org/stable/c/992a3f3e8a0c92151dfdf65fc85567c865fd558aPatch
- https://git.kernel.org/stable/c/ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5aPatch
- https://git.kernel.org/stable/c/d77531fac6a1fd9f1db0195438ba5419d72b96c4Patch
FAQ
What is CVE-2023-53055?
CVE-2023-53055 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: fscrypt: destroy keyring after security_sb_delete() fscrypt_destroy_keyring() must be called after all potentially-encrypted inode...
How severe is CVE-2023-53055?
CVE-2023-53055 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-2023-53055?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.