FKIE_CVE-2026-43502

Vulnerability from fkie_nvd - Published: 2026-05-21 13:16 - Updated: 2026-07-23 16:10
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net/rds: handle zerocopy send cleanup before the message is queued A zerocopy send can fail after user pages have been pinned but before the message is attached to the sending socket. The purge path currently infers zerocopy state from rm->m_rs, so an unqueued message can be cleaned up as if it owned normal payload pages. However, zerocopy ownership is really determined by the presence of op_mmp_znotifier, regardless of whether the message has reached the socket queue. Capture op_mmp_znotifier up front in rds_message_purge() and use it as the cleanup discriminator. If the message is already associated with a socket, keep the existing completion path. Otherwise, drop the pinned page accounting directly and release the notifier before putting the payload pages. This keeps early send failure cleanup consistent with the zerocopy lifetime rules without changing the normal queued completion path.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f5c185fc79a59ee9991234dd6d2a3e5afa6e75bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/14ef6fd18db2494098b21e0471bf27a1d8e9993ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1e262db7675e27f42c3f3f47d6011855f4454f24Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/21d70744e6d3bbf9293aa1ee6fba7c53ad75275ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3abc8983b2bae3f487f77d9da5527d7d6b210d46Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/44b550d88b267320459d518c0743a241ab2108faPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/46662f7dc59475995609bf3e9d27eb36f4acf26fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e9aefdc5c53fe9aed108c14e3d155710a1bb14c9Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 7.1
linux linux_kernel 7.1
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/rds/message.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e9aefdc5c53fe9aed108c14e3d155710a1bb14c9",
              "status": "affected",
              "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
              "versionType": "git"
            },
            {
              "lessThan": "46662f7dc59475995609bf3e9d27eb36f4acf26f",
              "status": "affected",
              "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
              "versionType": "git"
            },
            {
              "lessThan": "1e262db7675e27f42c3f3f47d6011855f4454f24",
              "status": "affected",
              "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "3abc8983b2bae3f487f77d9da5527d7d6b210d46",
              "status": "affected",
              "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
              "versionType": "git"
            },
            {
              "lessThan": "14ef6fd18db2494098b21e0471bf27a1d8e9993e",
              "status": "affected",
              "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/rds/message.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.17"
            },
            {
              "lessThan": "4.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.88",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "CF9EFBB4-E004-479B-A237-DECC87FD4D0E",
              "versionEndExcluding": "5.10.258",
              "versionStartIncluding": "4.17",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "919C10A9-7951-4A74-BADD-C135A0A8D8B4",
              "versionEndExcluding": "5.15.209",
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              "vulnerable": true
            },
            {
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              "matchCriteriaId": "92385813-D91D-480D-83A1-F423D2CBB2BA",
              "versionEndExcluding": "6.1.175",
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              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A1A92866-F406-43B5-B2D1-CFC274753E9D",
              "versionEndExcluding": "6.6.140",
              "versionStartIncluding": "6.2",
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            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            {
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              "versionEndExcluding": "6.18.30",
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D0893CA7-9AE6-4DFE-AC75-48967D73AD8E",
              "versionEndExcluding": "7.0.7",
              "versionStartIncluding": "6.19",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: handle zerocopy send cleanup before the message is queued\n\nA zerocopy send can fail after user pages have been pinned but before\nthe message is attached to the sending socket.\n\nThe purge path currently infers zerocopy state from rm-\u003em_rs, so an\nunqueued message can be cleaned up as if it owned normal payload pages.\nHowever, zerocopy ownership is really determined by the presence of\nop_mmp_znotifier, regardless of whether the message has reached the\nsocket queue.\n\nCapture op_mmp_znotifier up front in rds_message_purge() and use it as\nthe cleanup discriminator. If the message is already associated with a\nsocket, keep the existing completion path. Otherwise, drop the pinned\npage accounting directly and release the notifier before putting the\npayload pages.\n\nThis keeps early send failure cleanup consistent with the zerocopy\nlifetime rules without changing the normal queued completion path."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet/rds: manejar la limpieza de env\u00edo de zerocopy antes de que el mensaje sea encolado\n\nUn env\u00edo zerocopy puede fallar despu\u00e9s de que las p\u00e1ginas de usuario hayan sido fijadas pero antes de que el mensaje sea adjuntado al socket de env\u00edo.\n\nLa ruta de purga actualmente infiere el estado zerocopy de rm-\u003em_rs, por lo que un mensaje no encolado puede ser limpiado como si poseyera p\u00e1ginas de carga \u00fatil normales. Sin embargo, la propiedad zerocopy es realmente determinada por la presencia de op_mmp_znotifier, independientemente de si el mensaje ha llegado a la cola del socket.\n\nCapturar op_mmp_znotifier de antemano en rds_message_purge() y usarlo como discriminador de limpieza. Si el mensaje ya est\u00e1 asociado con un socket, mantener la ruta de finalizaci\u00f3n existente. De lo contrario, descartar la contabilidad de p\u00e1ginas fijadas directamente y liberar el notificador antes de colocar las p\u00e1ginas de carga \u00fatil.\n\nEsto mantiene la limpieza temprana de fallos de env\u00edo consistente con las reglas de vida \u00fatil de zerocopy sin cambiar la ruta de finalizaci\u00f3n encolada normal."
    }
  ],
  "id": "CVE-2026-43502",
  "lastModified": "2026-07-23T16:10:00.137",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-05-21T13:16:19.520",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/0f5c185fc79a59ee9991234dd6d2a3e5afa6e75b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/14ef6fd18db2494098b21e0471bf27a1d8e9993e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/1e262db7675e27f42c3f3f47d6011855f4454f24"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/21d70744e6d3bbf9293aa1ee6fba7c53ad75275e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/3abc8983b2bae3f487f77d9da5527d7d6b210d46"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/44b550d88b267320459d518c0743a241ab2108fa"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/46662f7dc59475995609bf3e9d27eb36f4acf26f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/e9aefdc5c53fe9aed108c14e3d155710a1bb14c9"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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