CVE-2024-39482
Description
In the Linux kernel, the following vulnerability has been resolved: bcache: fix variable length array abuse in btree_iter btree_iter is used in two ways: either allocated on the stack with a fixed size MAX_BSETS, or from a mempool with a dynamic size based on the specific cache set. Previously, the struct had a fixed-length array of size MAX_BSETS which was indexed out-of-bounds for the dynamically-sized iterators, which causes UBSAN to complain. This patch uses the same approach as in bcachefs's sort_iter and splits the iterator into a btree_iter with a flexible array member and a btree_iter_stack which embeds a btree_iter as well as a fixed-length data array.
How to fix
- linux linux_kernel5.10.221, 5.15.162, 6.1.94, 6.6.34, 6.9.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.10 ≤ v < 5.10.221, 5.15 ≤ v < 5.15.162, 6.1 ≤ v < 6.1.94, 6.6 ≤ v < 6.6.34, 6.9 ≤ v < 6.9.5 | 5.10.221, 5.15.162, 6.1.94, 6.6.34, 6.9.5 |
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