Description
In the Linux kernel, the following vulnerability has been resolved: fscrypt: use the mount idmap for the owner check in fscrypt_ioctl_set_policy() fscrypt_ioctl_set_policy() calls inode_owner_or_capable() with &nop_mnt_idmap before allowing an encryption policy to be set, instead of the idmap of the mount the ioctl was issued on. fscrypt is used by filesystems that support idmapped mounts (e.g. ext4, f2fs), so on such a mount this compares the caller's fsuid against the unmapped on-disk owner rather than the mapped owner: the actual owner can be wrongly denied with -EACCES and an unrelated caller wrongly allowed. Use file_mnt_idmap(filp) instead.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
14f3db5542e62bcf6fe088a09760ac52d55306c5 to < 174633a468817a49bd474bcfc9067c84e54efe68affected14f3db5542e62bcf6fe088a09760ac52d55306c5 to < 0baeb730044981f5ec5fb7d62a3763835ea606f6affected14f3db5542e62bcf6fe088a09760ac52d55306c5 to < 33b7e810ce09955aa02f3b632455cf5e7ac990a9affected14f3db5542e62bcf6fe088a09760ac52d55306c5 to < 6a67c460b12315033268dce597546984fe5739e7affected14f3db5542e62bcf6fe088a09760ac52d55306c5 to < 653e888a24c87b8bbeab44d7e558a1c1a3641088affected14f3db5542e62bcf6fe088a09760ac52d55306c5 to < 98516ba8b817f34e86bdd7a5b7a383cff75c3ddfaffected14f3db5542e62bcf6fe088a09760ac52d55306c5 to < cf6c993c0feca7984797e634deba3c80342e199aaffected
Linux Linux
Default version status: affected
5.12affected0 to < 5.12unaffected5.15.217 to ≤ 5.15.*unaffected6.1.184 to ≤ 6.1.*unaffected6.6.152 to ≤ 6.6.*unaffected6.12.104 to ≤ 6.12.*unaffected6.18.45 to ≤ 6.18.*unaffected7.1.9 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/174633a468817a49bd474bcfc9067c84e54efe68 ↗
- https://git.kernel.org/stable/c/0baeb730044981f5ec5fb7d62a3763835ea606f6 ↗
- https://git.kernel.org/stable/c/33b7e810ce09955aa02f3b632455cf5e7ac990a9 ↗
- https://git.kernel.org/stable/c/6a67c460b12315033268dce597546984fe5739e7 ↗
- https://git.kernel.org/stable/c/653e888a24c87b8bbeab44d7e558a1c1a3641088 ↗
- https://git.kernel.org/stable/c/98516ba8b817f34e86bdd7a5b7a383cff75c3ddf ↗
- https://git.kernel.org/stable/c/cf6c993c0feca7984797e634deba3c80342e199a ↗