« Volver al listado

CVE-2026-74399

Estado: RecibidaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

evm: terminate and bound the evm_xattrs read buffer

evm_read_xattrs() allocates size + 1 bytes, fills them from the list of enabled xattrs, and then passes strlen(temp) to simple_read_from_buffer(). When no configured xattrs are enabled, the fill loop stores nothing and temp[0] remains uninitialized, so strlen() reads beyond initialized memory.

Explicitly terminate the buffer after allocation, use snprintf() for each formatted line, and pass the accumulated length, without risk of truncation, to simple_read_from_buffer().

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-74399",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "fa516b66a1bfce1d72f1620c54bdfebc493000d1",
              "lessThan": "8df81954d22a653a8b01d46692cd56f71137269b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fa516b66a1bfce1d72f1620c54bdfebc493000d1",
              "lessThan": "0b9f8282b40af4a99d6243d2cb939d14ff36b049",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fa516b66a1bfce1d72f1620c54bdfebc493000d1",
              "lessThan": "a36cbfb85f26e6c6fb6529b1a364331b94dc88f3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fa516b66a1bfce1d72f1620c54bdfebc493000d1",
              "lessThan": "12ad52dc45a0c8c9d25e85b4a84201de4c5420ed",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fa516b66a1bfce1d72f1620c54bdfebc493000d1",
              "lessThan": "a0f64cf8bfcb39e533d9e27aeb763a8d81b7f39d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fa516b66a1bfce1d72f1620c54bdfebc493000d1",
              "lessThan": "38b7d63b23aa9d2ddde7688040e9426d32be4065",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fa516b66a1bfce1d72f1620c54bdfebc493000d1",
              "lessThan": "11143a19f5b8dc8f414deab87571134f9f447313",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "security/integrity/evm/evm_secfs.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.18"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.18",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "security/integrity/evm/evm_secfs.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:22:41.917",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0b9f8282b40af4a99d6243d2cb939d14ff36b049",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/11143a19f5b8dc8f414deab87571134f9f447313",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/12ad52dc45a0c8c9d25e85b4a84201de4c5420ed",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/38b7d63b23aa9d2ddde7688040e9426d32be4065",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8df81954d22a653a8b01d46692cd56f71137269b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a0f64cf8bfcb39e533d9e27aeb763a8d81b7f39d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a36cbfb85f26e6c6fb6529b1a364331b94dc88f3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nevm: terminate and bound the evm_xattrs read buffer\n\nevm_read_xattrs() allocates size + 1 bytes, fills them from the list of\nenabled xattrs, and then passes strlen(temp) to\nsimple_read_from_buffer(). When no configured xattrs are enabled, the\nfill loop stores nothing and temp[0] remains uninitialized, so strlen()\nreads beyond initialized memory.\n\nExplicitly terminate the buffer after allocation, use snprintf() for\neach formatted line, and pass the accumulated length, without risk of\ntruncation, to simple_read_from_buffer()."
    }
  ],
  "lastModified": "2026-08-17T06:19:35.083",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}