{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-80831",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-80831"
  ],
  "published": "2026-09-04T15:53:40Z",
  "summary": "crypto: mxs-dcp - fix source scatterlist length access",
  "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.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.187",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-80831"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fd0f211b27a6ec2ebd8c315683401b43adcc5511"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/04201dcc88b26eac52f736e39727fc5c420b7257"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e72a795df521cb65b7c4705cc11078cdacfaa2f4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1537bd55b4f842565068c54b47cd2ae1777d5f8f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/da14fae5203b72ca71ccfa9af8de9249e40d533a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/182f16a20d329a1c818d51dad57d9bf43d356c7c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0e9edb108a63bbbef952dfcbc597e34ed9c1fb74"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6ef9a4afb52cb102ab038cd42352c142d8505d09"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-04T15:53:40Z"
  }
}