CVE-2024-39482
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…
Does this matter?
Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.24% probability · 15th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-770
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0c31344e22dd8d6b1394c6e4c41d639015bdc671Mailing List, Patch
- https://git.kernel.org/stable/c/2c3d7b03b658dc8bfa6112b194b67b92a87e081bMailing List, Patch
- https://git.kernel.org/stable/c/3a861560ccb35f2a4f0a4b8207fa7c2a35fc7f31Mailing List, Patch
- https://git.kernel.org/stable/c/5a1922adc5798b7ec894cd3f197afb6f9591b023Mailing List, Patch
- https://git.kernel.org/stable/c/6479b9f41583b013041943c4602e1ad61cec8148Mailing List, Patch
- https://git.kernel.org/stable/c/934e1e4331859183a861f396d7dfaf33cb5afb02Mailing List, Patch
- https://git.kernel.org/stable/c/0c31344e22dd8d6b1394c6e4c41d639015bdc671Mailing List, Patch
- https://git.kernel.org/stable/c/2c3d7b03b658dc8bfa6112b194b67b92a87e081bMailing List, Patch
- https://git.kernel.org/stable/c/3a861560ccb35f2a4f0a4b8207fa7c2a35fc7f31Mailing List, Patch
- https://git.kernel.org/stable/c/5a1922adc5798b7ec894cd3f197afb6f9591b023Mailing List, Patch
- https://git.kernel.org/stable/c/6479b9f41583b013041943c4602e1ad61cec8148Mailing List, Patch
- https://git.kernel.org/stable/c/934e1e4331859183a861f396d7dfaf33cb5afb02Mailing List, Patch
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html
- https://cert-portal.siemens.com/productcert/html/ssa-613116.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.