CVE-2026-80831Hinoki check available

Incorrect AES processing via unmapped scatterlist length

Published Sep 4, 2026 · Updated Sep 4, 2026

Incorrect scatterlist length handling in the Linux mxs-dcp crypto driver allows attackers to make AES process the wrong byte count. mxs_dcp_aes_block_crypt() reads sg_dma_len() before the source scatterlist is mapped, so the value can be zero or stale instead of the original scatterlist length. The faulty path is limited to kernels with CONFIG_NEED_SG_DMA_LENGTH=y and causes encryption or decryption to cover an incorrect number of bytes.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Incorrect scatterlist length handling in the Linux mxs-dcp crypto driver allows attackers to make AES process the wrong byte count. mxs_dcp_aes_block_crypt() reads sg_dma_len() before the source scatterlist is mapped, so the value can be zero or stale instead of the original scatterlist length. The faulty path is limited to kernels with CONFIG_NEED_SG_DMA_LENGTH=y and causes encryption or decryption to cover an incorrect number of bytes.

The record

CVE
CVE-2026-80831
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <04201dcc88b26eac52f736e39727fc5c420b7257
  2. Affected versionversion=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <0e9edb108a63bbbef952dfcbc597e34ed9c1fb74
  3. Affected versionversion=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <1537bd55b4f842565068c54b47cd2ae1777d5f8f
  4. Affected versionversion=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <182f16a20d329a1c818d51dad57d9bf43d356c7c
  5. Affected versionversion=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <6ef9a4afb52cb102ab038cd42352c142d8505d09
  6. Affected versionversion=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8
  7. Affected versionversion=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <da14fae5203b72ca71ccfa9af8de9249e40d533a
  8. Affected versionversion=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <e72a795df521cb65b7c4705cc11078cdacfaa2f4
  9. Affected versionversion=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <fd0f211b27a6ec2ebd8c315683401b43adcc5511
  10. Affected versionversion=3.14

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <04201dcc88b26eac52f736e39727fc5c420b7257; version=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <0e9edb108a63bbbef952dfcbc597e34ed9c1fb74; version=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <1537bd55b4f842565068c54b47cd2ae1777d5f8f; version=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <182f16a20d329a1c818d51dad57d9bf43d356c7c; version=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <6ef9a4afb52cb102ab038cd42352c142d8505d09; version=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8; version=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <da14fae5203b72ca71ccfa9af8de9249e40d533a; version=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <e72a795df521cb65b7c4705cc11078cdacfaa2f4; version=15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 <fd0f211b27a6ec2ebd8c315683401b43adcc5511; version=3.14

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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