{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3"
            },
            {
              "fixed": "c6e51512a784c4a7b86e1a044988696e3b3721fa"
            },
            {
              "fixed": "03014551938a0887fa55f18ce49b70158a9c0113"
            },
            {
              "fixed": "d84ce1786ce40fdd3dd98db47aec5527817e1ef6"
            },
            {
              "fixed": "9115669faedccdda100428e2d26fd0aac8c50799"
            },
            {
              "fixed": "0bbbff00a15b1df2cac9014d6cf4b6890f473353"
            },
            {
              "fixed": "640e37f58f991546a87540d067279c2c1fa9fe51"
            },
            {
              "fixed": "290e833d1acb1093bc121fcdc97f5e6161157479"
            },
            {
              "fixed": "e174929793195e0cd6a4adb0cad731b39f9019b4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.17.0"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.141"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.91"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.33"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43494.json"
  },
  "details": "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",
  "modified": "2026-07-08T05:38:13.266212203Z",
  "published": "2026-05-21T10:49:21.310Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/21/2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721fa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/v12-security/pocs/tree/main/pintheft"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43494.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/security/cve/CVE-2026-43494"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43494.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43494"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480434"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "net/rds: reset op_nents when zerocopy page pin fails"
}