{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43494","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:56.013Z","datePublished":"2026-05-21T10:49:21.310Z","dateUpdated":"2026-07-15T00:55:52.893Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-14T17:45:20.190Z"},"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->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()."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/rds/message.c"],"versions":[{"version":"0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3","lessThan":"c6e51512a784c4a7b86e1a044988696e3b3721fa","status":"affected","versionType":"git"},{"version":"0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3","lessThan":"03014551938a0887fa55f18ce49b70158a9c0113","status":"affected","versionType":"git"},{"version":"0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3","lessThan":"d84ce1786ce40fdd3dd98db47aec5527817e1ef6","status":"affected","versionType":"git"},{"version":"0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3","lessThan":"9115669faedccdda100428e2d26fd0aac8c50799","status":"affected","versionType":"git"},{"version":"0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3","lessThan":"0bbbff00a15b1df2cac9014d6cf4b6890f473353","status":"affected","versionType":"git"},{"version":"0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3","lessThan":"640e37f58f991546a87540d067279c2c1fa9fe51","status":"affected","versionType":"git"},{"version":"0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3","lessThan":"290e833d1acb1093bc121fcdc97f5e6161157479","status":"affected","versionType":"git"},{"version":"0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3","lessThan":"e174929793195e0cd6a4adb0cad731b39f9019b4","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/rds/message.c"],"versions":[{"version":"4.17","status":"affected"},{"version":"0","lessThan":"4.17","status":"unaffected","versionType":"semver"},{"version":"5.10.258","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.209","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.175","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.141","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.91","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.33","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.10","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.6.141"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.12.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.18.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721fa"},{"url":"https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113"},{"url":"https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6"},{"url":"https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799"},{"url":"https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353"},{"url":"https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51"},{"url":"https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479"},{"url":"https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4"},{"url":"https://github.com/v12-security/pocs/tree/main/pintheft"}],"title":"net/rds: reset op_nents when zerocopy page pin fails","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/05/21/2"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-05-21T15:04:20.704Z"}},{"affected":[{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"kernel","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unaffected","packageName":"kernel","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"kernel","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"kernel","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"kernel","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}],"datePublic":"2026-05-21T00:00:00.000Z","descriptions":[{"lang":"en","value":"A flaw was found in the Linux kernel, specifically within the `net/rds` module. When a zerocopy page pin operation fails, a counter used for memory management (`op_nents`) is not correctly reset. This can result in a double-free vulnerability, where the same memory is released twice. A local attacker could potentially exploit this to cause the system to crash (denial of service) or, in some cases, execute unauthorized code."}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Important"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1341","description":"Multiple Releases of Same Resource or Handle","lang":"en","type":"CWE"}]}],"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-43494"},{"name":"RHBZ#2480434","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2480434"},{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43494.json"}],"timeline":[{"lang":"en","time":"2026-05-21T00:00:00.000Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-05-21T00:00:00.000Z","value":"Made public."}],"title":"kernel: net/rds: reset op_nents when zerocopy page pin fails","x_adpType":"supplier","x_generator":{"engine":"sadp-cli 1.0.0"},"providerMetadata":{"orgId":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","shortName":"redhat-SADP","dateUpdated":"2026-07-15T00:55:52.893Z"}}]}}