{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-80928",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-80928"
  ],
  "published": "2026-09-11T19:47:07Z",
  "summary": "smack: fix cred UAF in smack_file_send_sigiotask()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmack: fix cred UAF in smack_file_send_sigiotask()\n\nWhen inspecting the credentials of another task, objective credentials\n(->real_cred, accessed with __task_cred()) must always be used.\n\nAccessing ->cred on a non-current task is forbidden unless that task is\nbeing created or destroyed; a task is allowed to change its own ->cred\npointer with no synchronization, and changing ->cred should only affect the\ncurrent syscall.\n\nsmack_file_send_sigiotask() was accessing both sets of credentials: First\ntsk->cred, then __task_cred(tsk).\n\nFix it, always access the objective credentials here.\n\nI have tested that this bug can lead to a KASAN-reported UAF of struct cred\nin smack_file_send_sigiotask(), and that this fix prevents the race.",
  "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": "6.1.188",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-80928"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a512366d84e134a9eefc2cc40eeb6e80e2ec162c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7c7fe043f3099d0d35002b248967f75e55345b93"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f9c7b1f2b9d8f4176d2632743f51400855978ace"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b5bcf3adfa27279da4401ab8f1e1a706601a92be"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ed64aa505875a3b4defd504ee8e59e1949246a62"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b791401bf389a1546a830d2b381ca60fe94c7870"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fedc88e38ce979a720cd2de042578cb5df3dc8de"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-14T12:06:03Z"
  }
}