CVE-2026-80831 PUBLISHED

crypto: mxs-dcp - fix source scatterlist length access

Assigner: Linux
Reserved: 26.08.2026 Published: 04.09.2026 Updated: 04.09.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 to fd0f211b27a6ec2ebd8c315683401b43adcc5511 (excl.)
  • affected from 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 to 04201dcc88b26eac52f736e39727fc5c420b7257 (excl.)
  • affected from 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 to e72a795df521cb65b7c4705cc11078cdacfaa2f4 (excl.)
  • affected from 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 to 1537bd55b4f842565068c54b47cd2ae1777d5f8f (excl.)
  • affected from 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 to da14fae5203b72ca71ccfa9af8de9249e40d533a (excl.)
  • affected from 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 to 182f16a20d329a1c818d51dad57d9bf43d356c7c (excl.)
  • affected from 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 to 0e9edb108a63bbbef952dfcbc597e34ed9c1fb74 (excl.)
  • affected from 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 to 6ef9a4afb52cb102ab038cd42352c142d8505d09 (excl.)
  • affected from 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 to c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 3.14 is affected
  • unaffected from 0 to 3.14 (excl.)
  • unaffected from 5.10.269 to 5.10.* (incl.)
  • unaffected from 5.15.220 to 5.15.* (incl.)
  • unaffected from 6.1.187 to 6.1.* (incl.)
  • unaffected from 6.6.156 to 6.6.* (incl.)
  • unaffected from 6.12.108 to 6.12.* (incl.)
  • unaffected from 6.18.49 to 6.18.* (incl.)
  • unaffected from 7.1.13 to 7.1.* (incl.)
  • unaffected from 7.2.3 to 7.2.* (incl.)
  • unaffected from 7.3-rc1 to * (incl.)

References