CVE-2024-40970Avoid hw_desc array overrun in dw-axi-dmac
- 7.8HighCVSS base score
- 0.30%Exploitation in 30 daysEPSS · top 77% 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: Avoid hw_desc array overrun in dw-axi-dmac I have a use case where nr_buffers = 3 and in which each descriptor is composed by 3 segments, resulting in the DMA channel descs_allocated to be 9. Since axi_desc_put() handles the hw_desc considering the descs_allocated, this scenario would result in a kernel panic (hw_desc array will be overrun). To fix this, the proposal is to add a new member to the axi_dma_desc structure, where we keep the number of allocated hw_descs (axi_desc_alloc()) and use it in axi_desc_put() to handle the hw_desc array correctly. Additionally I propose to remove the axi_chan_start_first_queued() call after completing the transfer, since it was identified that unbalance can occur (started descriptors can be interrupted and transfer ignored due to DMA channel not being enabled).
Timeline
ID reserved
By Linux
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)
- 0.30% · top 77% of all CVEs (14 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 ef6fb2d6f1abd56cc067c694253ea362159b5ac3 – < 7c3bb96a20cd8db3b8824b2ff08b6cde4505c7e5
- affected ef6fb2d6f1abd56cc067c694253ea362159b5ac3 – < dd42570018f5962c10f215ad9c21274ed5d3541e
- affected ef6fb2d6f1abd56cc067c694253ea362159b5ac3 – < e151ae1ee065cf4b8ce4394ddb9d9c8df6370c66
- affected ef6fb2d6f1abd56cc067c694253ea362159b5ac3 – < 9004784e8d68bcd1ac1376407ba296fa28f04dbe
- affected ef6fb2d6f1abd56cc067c694253ea362159b5ac3 – < 333e11bf47fa8d477db90e2900b1ed3c9ae9b697
- affected 5.12
- unaffected < 5.12
- unaffected 5.15.162 – ≤ 5.15.*
- unaffected 6.1.96 – ≤ 6.1.*
- unaffected 6.6.36 – ≤ 6.6.*
- unaffected 6.9.7 – ≤ 6.9.*
- unaffected 6.10 – ≤ *
References
References6
- https://git.kernel.org/stable/c/7c3bb96a20cd8db3b8824b2ff08b6cde4505c7e5 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/dd42570018f5962c10f215ad9c21274ed5d3541e (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/e151ae1ee065cf4b8ce4394ddb9d9c8df6370c66 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/9004784e8d68bcd1ac1376407ba296fa28f04dbe (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/333e11bf47fa8d477db90e2900b1ed3c9ae9b697 (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.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-2024-38767 (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-2024-40970)Record last updated .