net/rds: reset op_nents when zerocopy page pin fails_CVE-2026-43494

{
    "lastseen": "",
    "description": "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->data.op_mmp_znotifier is cleared.  But we fail to properly\nclear rm->data.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().",
    "published": "2026-05-21T10:49:21.310Z",
    "modified": "2026-05-30T10:45:08.629Z",
    "type": "cve",
    "title": "net/rds: reset op_nents when zerocopy page pin fails",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799\nhttps://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353\nhttps://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51\nhttps://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479\nhttps://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4",
    "id": "CVE-2026-43494",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3\nLinux Linux 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3\nLinux Linux 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3\nLinux Linux 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3\nLinux Linux 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3\nLinux Linux 4.17",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}