CVE-2026-74391

{
  "id": "CVE-2026-74391",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-08-15T06:22:41.067",
  "lastModified": "2026-10-30T13:19:56.620",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "kernel/trace/trace_events_hist.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "02205a6752f223779a1b0e9e8ffacbea6e717851",
              "lessThan": "9f8ef2e1e95a42044e614b0a5277e3f53f545135",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "02205a6752f223779a1b0e9e8ffacbea6e717851",
              "lessThan": "0c584c27f6649a93ec12061cc779a4bd8f7c1434",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "02205a6752f223779a1b0e9e8ffacbea6e717851",
              "lessThan": "88b901fdc1662b131ff908cbd017333b61e7acc8",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "02205a6752f223779a1b0e9e8ffacbea6e717851",
              "lessThan": "baa333b2700a7fa3529d504529c8c10060fd687c",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "02205a6752f223779a1b0e9e8ffacbea6e717851",
              "lessThan": "cf334620036ad2250e008c7e7bb6646a3938b7b0",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "02205a6752f223779a1b0e9e8ffacbea6e717851",
              "lessThan": "f07883450eb14d1cf020b55d9f3a7ec5683bcd26",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "kernel/trace/trace_events_hist.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "4.17",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "4.17",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.145",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.97",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.40",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.1.5",
              "lessThanOrEqual": "7.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0c584c27f6649a93ec12061cc779a4bd8f7c1434",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/88b901fdc1662b131ff908cbd017333b61e7acc8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9f8ef2e1e95a42044e614b0a5277e3f53f545135",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/baa333b2700a7fa3529d504529c8c10060fd687c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cf334620036ad2250e008c7e7bb6646a3938b7b0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f07883450eb14d1cf020b55d9f3a7ec5683bcd26",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}