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.
| Software | From | Fixed in |
|---|---|---|
| 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-rc1 | 6.3-rc1.x |
| linux / linux_kernel | 6.3-rc2 | 6.3-rc2.x |
| linux / linux_kernel | 6.3-rc3 | 6.3-rc3.x |
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