CVE-2026-74566 - keys: make keyring key-chunk byte order agree with keyring_diff_objects()
Brief
CVE ID : CVE-2026-74566
Published : Aug. 15, 2026, 1:18 p. m.
- 7 hours, 48 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved:
keys: make keyring key-chunk byte order agree with keyring_diff_objects()
keyring_get_key_chunk() loads description bytes into the index chunk low address first, while keyring_diff_objects() numbers the first differing bit from the low end and folds the absolute byte index into the level without removing the inline-prefix offset the level already carries.
The two disagree on byte order and bit position, so the array can be told two keys first differ at a bit that does not differ in the chunk the walker uses, letting crafted descriptions collide into one node.
Load the chunk in the order keyring_diff_objects() assumes and drop the inline-prefix length when folding the byte index into the level.