« Volver al listado

CVE-2026-68158

Estado: RecibidaCrítica (9.8)—

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

libceph: Fix multiplication overflow in decode_new_up_state_weight()

If a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted osdmap, out-of-bounds memory accesses may occur in decode_new_up_state_weight(). This happens because the bounds check for the new_state part is based on calculating its length depending on a len value read from the incoming message. This calculation may overflow leading to an incorrect bounds check. Subsequently, out-of-bounds reads may occur when decoding this part.

This patch switches the multiplication to use check_mul_overflow() to abort processing the osdmap if an overflow occurred. Therefore, osdmaps/messages containing large values for len that result in a multiplication overflow are treated as invalid.

Leer descripción completaMostrar menos

[ idryomov: rename new_state_len -> new_state_item_size, formatting ]

CVSS

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vector AV:N/PR:N/UI:N indica explotación remota sin privilegios ni interacción (T1190). Lectura de memoria fuera de límites por corrupción de mensaje CEPH (C:H). Posible DoS por mensaje malicioso.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

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-2026-68158",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "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": "930c532869774ebf8af9efe9484c597f896a7d46",
              "lessThan": "2ceee3b77b83052648c40fef965f836fd7699d26",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "lessThan": "e4473751cc37db41f3f7da25d64a23e0c74570f1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "lessThan": "f6961070c326bd158c38fa48756cde2bd78c4aaa",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "lessThan": "05c90e059269f087becfcce23348496085835c29",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "lessThan": "143ba49ead77ec483c0326f8aaad8649874e99c4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "lessThan": "1732d89dfcd74f6fde9ce70900d316c4a151c153",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "lessThan": "bee4b5b53e7bff0467fd916cc44c9b190733c6bd",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "lessThan": "98917a499ec7064c14fc56d180a4fd636fc2784c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1196c36fd53c3b1615eb02f986cb727b1dfc1047",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6b96b2d473701b45df3fea8dd9796b6ec39e6d54",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7405d73cea0d0e6c541f5c534078feeb46188844",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8777c9f654637d56f4c4ca54eb1bc7c609b70085",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6831c98ce0b8a3e88db64aa224372effd0dcc694",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "032951d32c13b7564dfba82758260cb7aa1149d2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "14877928f10667a5606383885d004f7185f33718",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3.10.103",
              "lessThan": "3.11",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.12.63",
              "lessThan": "3.13",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.14.75",
              "lessThan": "3.15",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.16.39",
              "lessThan": "3.17",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.18.39",
              "lessThan": "3.19",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "4.1.30",
              "lessThan": "4.2",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "4.4.17",
              "lessThan": "4.5",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "4.6.6",
              "lessThan": "4.7",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "net/ceph/osdmap.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.7"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.7",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/ceph/osdmap.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-10T13:20:02.033",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/05c90e059269f087becfcce23348496085835c29",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/143ba49ead77ec483c0326f8aaad8649874e99c4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1732d89dfcd74f6fde9ce70900d316c4a151c153",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2ceee3b77b83052648c40fef965f836fd7699d26",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/98917a499ec7064c14fc56d180a4fd636fc2784c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bee4b5b53e7bff0467fd916cc44c9b190733c6bd",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e4473751cc37db41f3f7da25d64a23e0c74570f1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f6961070c326bd158c38fa48756cde2bd78c4aaa",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Fix multiplication overflow in decode_new_up_state_weight()\n\nIf a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted\nosdmap, out-of-bounds memory accesses may occur in\ndecode_new_up_state_weight(). This happens because the bounds check for\nthe new_state part is based on calculating its length depending on a len\nvalue read from the incoming message. This calculation may overflow\nleading to an incorrect bounds check. Subsequently, out-of-bounds reads\nmay occur when decoding this part.\n\nThis patch switches the multiplication to use check_mul_overflow() to\nabort processing the osdmap if an overflow occurred. Therefore,\nosdmaps/messages containing large values for len that result in a\nmultiplication overflow are treated as invalid.\n\n[ idryomov: rename new_state_len -> new_state_item_size, formatting ]"
    }
  ],
  "lastModified": "2026-08-19T17:20:33.133",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}