Vulnerability-Lookup

GHSA-FV42-PVCM-2C76

Vulnerability from github – Published: 2026-09-04 18:31 – Updated: 2026-09-04 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

crypto: mxs-dcp - fix source scatterlist length access

mxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source scatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid and could return zero or a stale DMA length, causing encryption and decryption to process the wrong number of bytes when CONFIG_NEED_SG_DMA_LENGTH=y.

Use the original scatterlist length instead.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80831"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-04T16:18:11Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: mxs-dcp - fix source scatterlist length access\n\nmxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source\nscatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid\nand could return zero or a stale DMA length, causing encryption and\ndecryption to process the wrong number of bytes when\nCONFIG_NEED_SG_DMA_LENGTH=y.\n\nUse the original scatterlist length instead.",
  "id": "GHSA-fv42-pvcm-2c76",
  "modified": "2026-09-04T18:31:28Z",
  "published": "2026-09-04T18:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80831"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/04201dcc88b26eac52f736e39727fc5c420b7257"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e9edb108a63bbbef952dfcbc597e34ed9c1fb74"
    },
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      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1537bd55b4f842565068c54b47cd2ae1777d5f8f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/182f16a20d329a1c818d51dad57d9bf43d356c7c"
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    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6ef9a4afb52cb102ab038cd42352c142d8505d09"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/da14fae5203b72ca71ccfa9af8de9249e40d533a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e72a795df521cb65b7c4705cc11078cdacfaa2f4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd0f211b27a6ec2ebd8c315683401b43adcc5511"
    }
  ],
  "schema_version": "1.4.0",
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}

CVE-2026-80831 (GCVE-0-2026-80831)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:54 – Updated: 2026-09-04 15:54

Title

crypto: mxs-dcp - fix source scatterlist length access

Summary

In the Linux kernel, the following vulnerability has been resolved: crypto: mxs-dcp - fix source scatterlist length access mxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source scatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid and could return zero or a stale DMA length, causing encryption and decryption to process the wrong number of bytes when CONFIG_NEED_SG_DMA_LENGTH=y. Use the original scatterlist length instead.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

9 references

URL	Tags
https://git.kernel.org/stable/c/fd0f211b27a6ec2eb…
https://git.kernel.org/stable/c/04201dcc88b26eac5…
https://git.kernel.org/stable/c/e72a795df521cb65b…
https://git.kernel.org/stable/c/1537bd55b4f842565…
https://git.kernel.org/stable/c/da14fae5203b72ca7…
https://git.kernel.org/stable/c/182f16a20d329a1c8…
https://git.kernel.org/stable/c/0e9edb108a63bbbef…
https://git.kernel.org/stable/c/6ef9a4afb52cb102a…
https://git.kernel.org/stable/c/c5bcb084a9871e5b6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 , < fd0f211b27a6ec2ebd8c315683401b43adcc5511 (git) Affected: 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 , < 04201dcc88b26eac52f736e39727fc5c420b7257 (git) Affected: 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 , < e72a795df521cb65b7c4705cc11078cdacfaa2f4 (git) Affected: 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 , < 1537bd55b4f842565068c54b47cd2ae1777d5f8f (git) Affected: 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 , < da14fae5203b72ca71ccfa9af8de9249e40d533a (git) Affected: 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 , < 182f16a20d329a1c818d51dad57d9bf43d356c7c (git) Affected: 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 , < 0e9edb108a63bbbef952dfcbc597e34ed9c1fb74 (git) Affected: 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 , < 6ef9a4afb52cb102ab038cd42352c142d8505d09 (git) Affected: 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 , < c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8 (git)
Linux	Linux	Affected: 3.14 Unaffected: 0 , < 3.14 (semver) Unaffected: 5.10.269 , ≤ 5.10.* (semver) Unaffected: 5.15.220 , ≤ 5.15.* (semver) Unaffected: 6.1.187 , ≤ 6.1.* (semver) Unaffected: 6.6.156 , ≤ 6.6.* (semver) Unaffected: 6.12.108 , ≤ 6.12.* (semver) Unaffected: 6.18.49 , ≤ 6.18.* (semver) Unaffected: 7.1.13 , ≤ 7.1.* (semver) Unaffected: 7.2.3 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-FV42-PVCM-2C76

CVE-2026-80831 (GCVE-0-2026-80831)

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