{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-74391",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-74391"
  ],
  "published": "2026-08-15T06:04:33Z",
  "summary": "tracing: Bound synthetic-field strings with seq_buf",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Bound synthetic-field strings with seq_buf\n\nThe synthetic field helpers build a prefixed synthetic variable name and\na generated hist command in fixed MAX_FILTER_STR_VAL buffers. The\ncurrent code appends those strings with raw strcat(), so long key lists,\nfield names, or saved filters can run past the end of the staging\nbuffers.\n\nBuild both strings with seq_buf and propagate -E2BIG if either the\nsynthetic variable name or the generated command exceeds\nMAX_FILTER_STR_VAL. This keeps the existing tracing-side limit while\nusing the helper intended for bounded command construction.\n\n[ sdr: Moved struct seq_buf *s for upside-down x-mas tree formatting ]",
  "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": null,
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-74391"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0c584c27f6649a93ec12061cc779a4bd8f7c1434"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/88b901fdc1662b131ff908cbd017333b61e7acc8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/baa333b2700a7fa3529d504529c8c10060fd687c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cf334620036ad2250e008c7e7bb6646a3938b7b0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f07883450eb14d1cf020b55d9f3a7ec5683bcd26"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-17T05:24:08Z"
  }
}