{"id":"CVE-2026-43494","summary":"net/rds: reset op_nents when zerocopy page pin fails","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().","modified":"2026-07-09T18:29:41.853648864Z","published":"2026-05-21T10:49:21.310Z","related":["SUSE-SU-2026:2111-1","SUSE-SU-2026:21834-1","SUSE-SU-2026:21841-1","SUSE-SU-2026:21845-1","SUSE-SU-2026:21860-1","SUSE-SU-2026:21876-1","SUSE-SU-2026:21877-1","SUSE-SU-2026:21916-1","SUSE-SU-2026:21919-1","SUSE-SU-2026:2195-1","SUSE-SU-2026:2202-1","SUSE-SU-2026:2215-1","SUSE-SU-2026:2216-1","SUSE-SU-2026:2217-1","SUSE-SU-2026:2238-1","openSUSE-SU-2026:10954-1","openSUSE-SU-2026:20826-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43494.json","cna_assigner":"Linux"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3"},{"fixed":"c6e51512a784c4a7b86e1a044988696e3b3721fa"},{"fixed":"03014551938a0887fa55f18ce49b70158a9c0113"},{"fixed":"d84ce1786ce40fdd3dd98db47aec5527817e1ef6"},{"fixed":"9115669faedccdda100428e2d26fd0aac8c50799"},{"fixed":"0bbbff00a15b1df2cac9014d6cf4b6890f473353"},{"fixed":"640e37f58f991546a87540d067279c2c1fa9fe51"},{"fixed":"290e833d1acb1093bc121fcdc97f5e6161157479"},{"fixed":"e174929793195e0cd6a4adb0cad731b39f9019b4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43494.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","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"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43494.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}