CVE-2024-39482bcache: fix variable length array abuse in btree_iter
- 7.8HighCVSS base score
- 0.24%Exploitation in 30 daysEPSS · top 85% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 10 days later
· 10 days later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.24% · top 85% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected cafe563591446cf80bfbc2fe3bc72a2e36cf1060 – < 2c3d7b03b658dc8bfa6112b194b67b92a87e081b
- affected cafe563591446cf80bfbc2fe3bc72a2e36cf1060 – < 5a1922adc5798b7ec894cd3f197afb6f9591b023
- affected cafe563591446cf80bfbc2fe3bc72a2e36cf1060 – < 934e1e4331859183a861f396d7dfaf33cb5afb02
- affected cafe563591446cf80bfbc2fe3bc72a2e36cf1060 – < 6479b9f41583b013041943c4602e1ad61cec8148
- affected cafe563591446cf80bfbc2fe3bc72a2e36cf1060 – < 0c31344e22dd8d6b1394c6e4c41d639015bdc671
- affected cafe563591446cf80bfbc2fe3bc72a2e36cf1060 – < 3a861560ccb35f2a4f0a4b8207fa7c2a35fc7f31
- affected 3.10
- unaffected < 3.10
- unaffected 5.10.221 – ≤ 5.10.*
- unaffected 5.15.162 – ≤ 5.15.*
- unaffected 6.1.94 – ≤ 6.1.*
- unaffected 6.6.34 – ≤ 6.6.*
- unaffected 6.9.5 – ≤ 6.9.*
- unaffected 6.10 – ≤ *
References
References9
- https://git.kernel.org/stable/c/2c3d7b03b658dc8bfa6112b194b67b92a87e081b (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/5a1922adc5798b7ec894cd3f197afb6f9591b023 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/934e1e4331859183a861f396d7dfaf33cb5afb02 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/6479b9f41583b013041943c4602e1ad61cec8148 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/0c31344e22dd8d6b1394c6e4c41d639015bdc671 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/3a861560ccb35f2a4f0a4b8207fa7c2a35fc7f31 (opens in a new tab)x_transferred
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-613116.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-38007 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-39482)Record last updated .