CVE-2023-53055

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.

• linux linux kernel (>= 5.10.154 < 5.11) • linux linux kernel (>= 5.15.78 < 5.15.105) • linux linux kernel (>= 6.0.8 < 6.1.22) • linux linux kernel (>= 6.2 < 6.2.9) • linux linux kernel 6.3