{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-53016",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-53016"
  ],
  "published": "2026-06-24T16:31:02Z",
  "summary": "crypto: ccp - copy IV using skcipher ivsize",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: ccp - copy IV using skcipher ivsize\n\nAF_ALG rfc3686-ctr-aes-ccp requests pass an 8-byte IV to the driver.\n\nccp_aes_complete() restores AES_BLOCK_SIZE bytes into the caller's IV\nbuffer while RFC3686 skciphers expose an 8-byte IV, so the restore\noverruns the provided buffer.\n\nUse crypto_skcipher_ivsize() to copy only the algorithm's IV length.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
  "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": "6.1.175",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-53016"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/939061b2d0f7f15114e34b4ce878ef50ff4089c3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/798d409a8949f3f495f238549b86de2886b129bd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/dfb2cf434829819268fe50f41542aad318ad62b2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/eecee15e263ccb8cd77170a56ab6c969cb54dd6a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bb01d8f1f385bc9034ca114d3508c7fdea24fc9a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/df9784bb5b637ac80f4a2768a58ca9a50bef28a9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/227c1e1d9e2aa4cfc65ba446d5690da1f546cda4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a7a1f3cdd64d8a165d9b8c9e9ad7fb46ac19dfc4"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T13:16:28Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The vulnerable CCP skcipher path is reached through local AF_ALG socket syscalls, not by processing remote packets. An attacker binds an AF_ALG skcipher socket to `rfc3686-ctr-aes-ccp` and submits a request locally.\nAC:L - Once the affected CCP algorithm is present, the trigger is a deterministic AF_ALG request with an 8-byte RFC3686 IV. No race or condition outside the attacker's control is required.\nPR:L - AF_ALG socket creation, bind, key setup, accept, sendmsg, and recvmsg have no capability checks, so a basic unprivileged local user can reach the bug. The driver-only flag can be selected through the allowed AF_ALG feature/mask fields.\nUI:N - Exploitation is entirely driven by the attacker's local syscalls. No separate victim action is required.\nS:U - The vulnerability corrupts kernel memory within the same kernel security authority. It does not cross a VM, IOMMU, or similar security boundary.\nC:H - The bug is an attacker-reachable kernel heap out-of-bounds write caused by copying 16 IV bytes into an 8-byte AF_ALG IV buffer. Kernel memory corruption can reasonably be developed into information disclosure primitives.\nI:H - The overwrite corrupts adjacent kernel heap memory from an unprivileged request path. As an out-of-bounds write, it is defensibly scored as potentially enabling arbitrary memory modification or control-flow compromise.\nA:H - Even without full exploitation, the heap corruption can crash or destabilize the kernel. Repeated unprivileged triggering can therefore cause high availability impact."
    }
  }
}