« Volver al listado

CVE-2026-72129

Estado: RecibidaCrítica (9.8)—

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

nvmet-rdma: handle inline data with a nonzero offset

nvmet_rdma_use_inline_sg() maps the host-controlled inline data offset into the per-command inline scatterlist. The bounds check admits any offset with off + len <= inline_data_size, but the mapping still assumes the data begins in the first inline page:

When a port is configured with inline_data_size > PAGE_SIZE (settable up to max(SZ_16K, PAGE_SIZE)), an offset in (PAGE_SIZE, inline_data_size] makes "PAGE_SIZE - off" underflow, so sg->length is set to ~4 GiB and the block backend reads far past the first inline page. num_pages(len) also ignores the offset, so an in-bounds offset whose [off, off+len) span crosses a page boundary under-counts the scatterlist.

Leer descripción completaMostrar menos

Map the offset properly: split it into a page index and an in-page offset, start the scatterlist at that page, and size the page count from page_off + len. Because the request scatterlist may now start at inline_sg[page_idx] rather than inline_sg[0], generalize the inline-SGL identity test in nvmet_rdma_release_rsp() to a range test; otherwise the persistent inline scatterlist is mistaken for an allocated one and nvmet_req_free_sgls() frees an inline page (and warns in free_large_kmalloc()).

Detalles técnicos trazas, registros y código del informe original
	sg->offset = off;
	sg->length = min_t(int, len, PAGE_SIZE - off);

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.

Vulnerabilidad en Linux kernel (RDMA) explotable remotamente sin autenticación (AV:N, PR:N, UI:N). Acceso a datos inline (C:H) y corrupción potencial de memoria (I:H, A:H). El desbordamiento de buffer permite lectura fuera de límites de datos.

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-2026-72129",
  "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": "0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349",
              "lessThan": "c2106ba1b14d644a5203bea1a50dbe25dcad713c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349",
              "lessThan": "bf8bcc1c137d54a62a428b00051fdbb13660673b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349",
              "lessThan": "11401371152b228448a41d79c6de1c938f93049a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349",
              "lessThan": "7c96581169c9d9a7d0726e554313acfbead6141c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349",
              "lessThan": "42a8ea3acd883f4f210d9e54e0975b1e2292b529",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349",
              "lessThan": "2944113ad5fbcdf5d349d857c03d2a44b6de75b8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349",
              "lessThan": "98bcdfa619150b2f41fa15bac140dbaf2584ad05",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349",
              "lessThan": "48c0162f647bb47e6084ffbc71b8f213f5e2f4f8",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/nvme/target/rdma.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.19"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.19",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "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": [
            "drivers/nvme/target/rdma.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:21:30.320",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/11401371152b228448a41d79c6de1c938f93049a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2944113ad5fbcdf5d349d857c03d2a44b6de75b8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/42a8ea3acd883f4f210d9e54e0975b1e2292b529",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/48c0162f647bb47e6084ffbc71b8f213f5e2f4f8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7c96581169c9d9a7d0726e554313acfbead6141c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/98bcdfa619150b2f41fa15bac140dbaf2584ad05",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bf8bcc1c137d54a62a428b00051fdbb13660673b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c2106ba1b14d644a5203bea1a50dbe25dcad713c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-rdma: handle inline data with a nonzero offset\n\nnvmet_rdma_use_inline_sg() maps the host-controlled inline data offset\ninto the per-command inline scatterlist.  The bounds check admits any\noffset with off + len <= inline_data_size, but the mapping still assumes\nthe data begins in the first inline page:\n\n\tsg->offset = off;\n\tsg->length = min_t(int, len, PAGE_SIZE - off);\n\nWhen a port is configured with inline_data_size > PAGE_SIZE (settable up\nto max(SZ_16K, PAGE_SIZE)), an offset in (PAGE_SIZE, inline_data_size]\nmakes \"PAGE_SIZE - off\" underflow, so sg->length is set to ~4 GiB and\nthe block backend reads far past the first inline page.  num_pages(len)\nalso ignores the offset, so an in-bounds offset whose [off, off+len)\nspan crosses a page boundary under-counts the scatterlist.\n\nMap the offset properly: split it into a page index and an in-page\noffset, start the scatterlist at that page, and size the page count from\npage_off + len.  Because the request scatterlist may now start at\ninline_sg[page_idx] rather than inline_sg[0], generalize the inline-SGL\nidentity test in nvmet_rdma_release_rsp() to a range test; otherwise the\npersistent inline scatterlist is mistaken for an allocated one and\nnvmet_req_free_sgls() frees an inline page (and warns in\nfree_large_kmalloc())."
    }
  ],
  "lastModified": "2026-08-17T06:18:12.533",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}