FKIE_CVE-2026-43494

Vulnerability from fkie_nvd - Published: 2026-05-21 12:16 - Updated: 2026-06-17 10:49
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: reset op_nents when zerocopy page pin fails When iov_iter_get_pages2() fails in rds_message_zcopy_from_user(), the pinned pages are released with put_page(), and rm->data.op_mmp_znotifier is cleared. But we fail to properly clear rm->data.op_nents. Later when rds_message_purge() is called from rds_sendmsg() the cleanup loop iterates over the incorrectly non zero number of op_nents and frees them again. Fix this by properly resetting op_nents when it should be in rds_message_zcopy_from_user().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721fa
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://github.com/v12-security/pocs/tree/main/pintheft
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2026/05/21/2
Impacted products
Vendor Product Version
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": "c6e51512a784c4a7b86e1a044988696e3b3721fa",
              "status": "affected",
              "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
              "versionType": "git"
            },
            {
              "lessThan": "03014551938a0887fa55f18ce49b70158a9c0113",
              "status": "affected",
              "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
              "versionType": "git"
            },
            {
              "lessThan": "d84ce1786ce40fdd3dd98db47aec5527817e1ef6",
              "status": "affected",
              "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
              "versionType": "git"
            },
            {
              "lessThan": "9115669faedccdda100428e2d26fd0aac8c50799",
              "status": "affected",
              "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
              "versionType": "git"
            },
            {
              "lessThan": "0bbbff00a15b1df2cac9014d6cf4b6890f473353",
              "status": "affected",
              "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
              "versionType": "git"
            },
            {
              "lessThan": "640e37f58f991546a87540d067279c2c1fa9fe51",
              "status": "affected",
              "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
              "versionType": "git"
            },
            {
              "lessThan": "290e833d1acb1093bc121fcdc97f5e6161157479",
              "status": "affected",
              "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
              "versionType": "git"
            },
            {
              "lessThan": "e174929793195e0cd6a4adb0cad731b39f9019b4",
              "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": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: reset op_nents when zerocopy page pin fails\n\nWhen iov_iter_get_pages2() fails in rds_message_zcopy_from_user(),\nthe pinned pages are released with put_page(), and\nrm-\u003edata.op_mmp_znotifier is cleared.  But we fail to properly\nclear rm-\u003edata.op_nents.\n\nLater when rds_message_purge() is called from rds_sendmsg() the\ncleanup loop iterates over the incorrectly non zero number of\nop_nents and frees them again.\n\nFix this by properly resetting op_nents when it should be in\nrds_message_zcopy_from_user()."
    }
  ],
  "id": "CVE-2026-43494",
  "lastModified": "2026-06-17T10:49:48.710",
  "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": "2026-05-21T12:16:19.957",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721fa"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://github.com/v12-security/pocs/tree/main/pintheft"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/21/2"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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