linux: In the Linux kernel, the following vulnerability has been resolved: btrfs: set generation before calling btrfs_clean...
CVE-2022-50766 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50766, released December 24, 2025. It is not reported as exploited. Patch Radar priority: Routine.
In the Linux kernel, the following vulnerability has been resolved: btrfs: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer syzbot is reporting uninit-value in btrfs_clean_tree_block() [1], for commit bc877d285ca3dba2 ("btrfs: Deduplicate extent_buffer init code") missed that btrfs_set_header_generation() in btrfs_init_new_buffer() must not be moved to after clean_tree_block() because clean_tree_block() is calling btrfs_header_generation() since commit 55c69072d6bd5be1 ("Btrfs: Fix extent_buffer usage when nodesize != leafsize"). Since memzero_extent_buffer() will reset "struct btrfs_header" part, we can't move btrfs_set_header_generation() to before memzero_extent_buffer(). Just re-add btrfs_set_header_generation() before btrfs_clean_tree_block().
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 6.0.3-1 | DEBIAN-CVE-2022-50766 | Dec 24, 2025 |
| linux · Debian 13.5 (trixie) | 6.0.3-1 | DEBIAN-CVE-2022-50766 | Dec 24, 2025 |
| linux · Debian 14 | 6.0.3-1 | DEBIAN-CVE-2022-50766 | Dec 24, 2025 |
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