{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-80832",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-80832"
  ],
  "published": "2026-09-04T15:53:40Z",
  "summary": "crypto: qce - fix CCM AAD buffer underallocation",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: qce - fix CCM AAD buffer underallocation\n\nThe AAD buffer allocated in qce_aead_ccm_prepare_buf_assoclen()\ncan be smaller than the length later programmed into the DMA\nscatterlist.\n\nThe allocation size is currently calculated as:\n\n  ALIGN(assoclen, 16) + MAX_CCM_ADATA_HEADER_LEN\n\nwhile the DMA length is set to:\n\n  ALIGN(assoclen + adata_header_len, 16)\n\nSince ALIGN() does not distribute over addition, the allocation\ncan be smaller than the DMA length. For example, when\nassoclen = 32 and adata_header_len = 2:\n\n  allocation = ALIGN(32, 16) + 6 = 38\n  DMA length = ALIGN(32 + 2, 16) = 48\n\nAs a result, the QCE hardware can read beyond the allocated\nbuffer while computing the CBC-MAC over the associated data.\nThe extra bytes are folded into the authentication tag,\nresulting in an incorrect tag and causing CCM self-test\nfailures such as:\n\n  alg: aead: ccm-aes-qce encryption test failed (wrong result)\n  on test vector 8\n\nFix the allocation by adding the maximum possible AAD header\nlength before alignment:\n\n  ALIGN(assoclen + MAX_CCM_ADATA_HEADER_LEN, 16)\n\nThis guarantees that the allocated buffer is large enough\nfor the fully padded AAD data for all supported header sizes.",
  "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-2026-80832"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/11775b35ce9f27e73d62188d7d38aa0dc0a219aa"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c9e0f06a023107694698a7930616aeb460d91816"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cc56d2b0d77cfeea061e98114992ee687d5eb4dd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/002f1f99aef7ea631cb687fc17bce64e4963f6aa"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2f65718b9c1095eef1ae9b374aa0384b1b083f3c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/46a84efe2dbaddde89073a3c00c694486937c34b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4839f4c21f9c577eedef2919ced878a3057c7fc3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7f2345f47dd189625f657cd72437179ab4170ee1"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-04T15:53:40Z"
  }
}