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CVE-2024-40970 (GCVE-0-2024-40970)

Vulnerability from cvelistv5 – Published: 2024-07-12 12:32 – Updated: 2026-08-05 11:34
VLAI
Title
Avoid hw_desc array overrun in dw-axi-dmac
Summary
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).
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 17:02 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ef6fb2d6f1abd56cc067c694253ea362159b5ac3 , < 7c3bb96a20cd8db3b8824b2ff08b6cde4505c7e5 (git)
Affected: ef6fb2d6f1abd56cc067c694253ea362159b5ac3 , < dd42570018f5962c10f215ad9c21274ed5d3541e (git)
Affected: ef6fb2d6f1abd56cc067c694253ea362159b5ac3 , < e151ae1ee065cf4b8ce4394ddb9d9c8df6370c66 (git)
Affected: ef6fb2d6f1abd56cc067c694253ea362159b5ac3 , < 9004784e8d68bcd1ac1376407ba296fa28f04dbe (git)
Affected: ef6fb2d6f1abd56cc067c694253ea362159b5ac3 , < 333e11bf47fa8d477db90e2900b1ed3c9ae9b697 (git)
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Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.15.162 , ≤ 5.15.* (semver)
Unaffected: 6.1.96 , ≤ 6.1.* (semver)
Unaffected: 6.6.36 , ≤ 6.6.* (semver)
Unaffected: 6.9.7 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.