{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-64544",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-64544"
  ],
  "published": "2026-07-27T20:10:44Z",
  "summary": "crypto: asymmetric_keys - fix OOB read in pefile_digest_pe_contents",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: asymmetric_keys - fix OOB read in pefile_digest_pe_contents\n\npefile_digest_pe_contents() computes the trailing-data hash length as\npelen - (hashed_bytes + certs_size). A crafted PE can make the addition\nexceed pelen, causing the unsigned subtraction to underflow to ~4 GiB.\nThis is passed to crypto_shash_update() which reads out of bounds and\npanics on unmapped vmalloc guard pages.\n\n BUG: unable to handle page fault for address: ffffc900038d8000\n Oops: Oops: 0000 [#1] SMP KASAN NOPTI\n RIP: 0010:sha256_blocks_generic (lib/crypto/sha256.c:152)\n Call Trace:\n  <TASK>\n  __sha256_update (lib/crypto/sha256.c:208)\n  crypto_sha256_update (crypto/sha256.c:142)\n  verify_pefile_signature (crypto/asymmetric_keys/verify_pefile.c:436)\n  kexec_kernel_verify_pe_sig (kernel/kexec_file.c:151)\n  __do_sys_kexec_file_load (kernel/kexec_file.c:406)\n  do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n  </TASK>\n Kernel panic - not syncing: Fatal exception\n\nValidate that the addition does not overflow and the result does not\nexceed pelen before the subtraction. Return -ELIBBAD on failure.",
  "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": "6.1.178",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-64544"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/89efd998470a93284b7ad5a20d4e0e3c6858ae8e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7016377699b5b25b7ec3c0bf2ec3f983c7e95f7c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b798ada5a5d1cb4cc4cfa72074b1b463eca6c506"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/627938383761fb4334b41ebe7ef438d6b8b19d60"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e162bc386e71b5412425a38ee048e8d2185491b9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6acd2fbd00f9c72aebefce63fc2e73e8f3d79061"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/803591785d33cf13b6f73ce2796e8b9e6d5e6526"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f7dd32c5179d7755de18e21d5674b08f9e5cb180"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-17T05:24:08Z"
  }
}