{"schema_version":"1.7.5","id":"CVE-2026-46227","published":"2026-05-28T09:40:47.518Z","modified":"2026-07-24T18:29:55.052139526Z","related":["ALSA-2026:36018","ALSA-2026:36348","ALSA-2026:36349","ALSA-2026:36956","SUSE-SU-2026:22433-1","SUSE-SU-2026:22436-1","SUSE-SU-2026:22458-1","SUSE-SU-2026:22460-1","SUSE-SU-2026:22598-1","SUSE-SU-2026:22672-1","SUSE-SU-2026:22673-1","SUSE-SU-2026:22674-1","SUSE-SU-2026:22675-1","SUSE-SU-2026:22676-1","SUSE-SU-2026:22677-1","SUSE-SU-2026:22678-1","SUSE-SU-2026:22679-1","SUSE-SU-2026:22680-1","SUSE-SU-2026:22681-1","SUSE-SU-2026:22682-1","SUSE-SU-2026:22683-1","SUSE-SU-2026:22684-1","SUSE-SU-2026:22685-1","SUSE-SU-2026:22686-1","SUSE-SU-2026:22687-1","SUSE-SU-2026:22689-1","SUSE-SU-2026:22690-1","SUSE-SU-2026:22691-1","SUSE-SU-2026:22692-1","SUSE-SU-2026:22693-1","SUSE-SU-2026:22694-1","SUSE-SU-2026:22695-1","SUSE-SU-2026:22696-1","SUSE-SU-2026:22697-1","SUSE-SU-2026:22698-1","SUSE-SU-2026:22710-1","SUSE-SU-2026:22711-1","SUSE-SU-2026:22712-1","SUSE-SU-2026:22713-1","SUSE-SU-2026:22714-1","SUSE-SU-2026:22715-1","SUSE-SU-2026:22716-1","SUSE-SU-2026:22717-1","SUSE-SU-2026:22718-1","SUSE-SU-2026:22719-1","SUSE-SU-2026:22720-1","SUSE-SU-2026:22721-1","SUSE-SU-2026:22722-1","SUSE-SU-2026:22723-1","SUSE-SU-2026:22724-1","SUSE-SU-2026:22725-1","SUSE-SU-2026:22726-1","SUSE-SU-2026:22727-1","SUSE-SU-2026:22728-1","SUSE-SU-2026:22729-1","SUSE-SU-2026:22730-1","SUSE-SU-2026:22731-1","SUSE-SU-2026:22732-1","SUSE-SU-2026:22733-1","SUSE-SU-2026:22734-1","SUSE-SU-2026:22735-1","SUSE-SU-2026:22742-1","SUSE-SU-2026:22743-1","SUSE-SU-2026:22744-1","SUSE-SU-2026:22745-1","SUSE-SU-2026:22746-1","SUSE-SU-2026:22747-1","SUSE-SU-2026:22748-1","SUSE-SU-2026:22749-1","SUSE-SU-2026:22751-1","SUSE-SU-2026:22755-1","SUSE-SU-2026:22758-1","SUSE-SU-2026:22759-1","SUSE-SU-2026:22761-1","SUSE-SU-2026:22762-1","SUSE-SU-2026:22763-1","SUSE-SU-2026:22766-1","SUSE-SU-2026:22769-1","SUSE-SU-2026:22773-1","SUSE-SU-2026:22774-1","SUSE-SU-2026:22775-1","SUSE-SU-2026:22776-1","SUSE-SU-2026:22777-1","SUSE-SU-2026:22778-1","SUSE-SU-2026:22779-1","SUSE-SU-2026:22780-1","SUSE-SU-2026:22781-1","SUSE-SU-2026:22782-1","SUSE-SU-2026:22783-1","SUSE-SU-2026:22784-1","SUSE-SU-2026:22785-1","SUSE-SU-2026:22786-1","SUSE-SU-2026:2630-1","SUSE-SU-2026:2631-1","SUSE-SU-2026:2632-1","SUSE-SU-2026:2638-1","SUSE-SU-2026:2658-1","SUSE-SU-2026:2799-1","SUSE-SU-2026:2800-1","SUSE-SU-2026:2855-1","SUSE-SU-2026:2857-1","SUSE-SU-2026:2858-1","SUSE-SU-2026:2862-1","SUSE-SU-2026:2863-1","SUSE-SU-2026:2864-1","SUSE-SU-2026:2866-1","SUSE-SU-2026:2867-1","SUSE-SU-2026:2868-1","SUSE-SU-2026:2887-1","SUSE-SU-2026:2888-1","SUSE-SU-2026:2889-1","SUSE-SU-2026:2890-1","SUSE-SU-2026:2894-1","SUSE-SU-2026:2895-1","SUSE-SU-2026:2899-1","SUSE-SU-2026:2902-1","SUSE-SU-2026:2910-1","SUSE-SU-2026:2920-1","SUSE-SU-2026:2930-1","SUSE-SU-2026:2932-1","SUSE-SU-2026:2933-1","SUSE-SU-2026:2937-1","SUSE-SU-2026:2938-1","SUSE-SU-2026:2943-1","SUSE-SU-2026:2945-1","SUSE-SU-2026:2956-1","SUSE-SU-2026:2957-1","SUSE-SU-2026:2961-1","SUSE-SU-2026:2989-1","SUSE-SU-2026:2991-1","SUSE-SU-2026:2993-1","SUSE-SU-2026:2997-1","SUSE-SU-2026:3001-1","SUSE-SU-2026:3002-1","SUSE-SU-2026:3075-1","SUSE-SU-2026:3083-1","openSUSE-SU-2026:10954-1","openSUSE-SU-2026:21388-1"],"summary":"sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL\n\nThe SCTP_SENDALL path in sctp_sendmsg() iterates ep->asocs with\nlist_for_each_entry_safe(), which caches the next entry in @tmp before\nthe loop body runs.  The body calls sctp_sendmsg_to_asoc(), which may\ndrop the socket lock inside sctp_wait_for_sndbuf().\n\nWhile the lock is dropped, another thread can SCTP_SOCKOPT_PEELOFF the\nassociation cached in @tmp, migrating it to a new endpoint via\nsctp_sock_migrate() (list_del_init() + list_add_tail() to\nnewep->asocs), and optionally close the new socket which frees the\nassociation via kfree_rcu().  The cached @tmp can also be freed by a\nnetwork ABORT for that association, processed in softirq while the\nlock is dropped.\n\nsctp_wait_for_sndbuf() revalidates @asoc (the current entry) on re-lock\nvia the \"sk != asoc->base.sk\" and \"asoc->base.dead\" checks, but nothing\nrevalidates @tmp.  After a successful return, the iterator advances to\nthe stale @tmp, yielding either a use-after-free (if the peeled socket\nwas closed) or a list-walk onto the new endpoint's list head (type\nconfusion of &newep->asocs as a struct sctp_association *).\n\nBoth are reachable from CapEff=0; the type-confusion path gives\ncontrolled indirect call via the outqueue.sched->init_sid pointer.\n\nFix by re-deriving @tmp from @asoc after sctp_sendmsg_to_asoc()\nreturns.  @asoc is known to still be on ep->asocs at that point: the\nonly callers that list_del an association from ep->asocs are\nsctp_association_free() (which sets asoc->base.dead) and\nsctp_assoc_migrate() (which changes asoc->base.sk), and\nsctp_wait_for_sndbuf() checks both under the lock before any\nsuccessful return; a tripped check propagates as err < 0 and the loop\nbails before the re-derive.\n\nThe SCTP_ABORT path in sctp_sendmsg_check_sflags() returns 0 and the\nloop hits 'continue' before sctp_sendmsg_to_asoc() is ever called, so\nthe @tmp cached by list_for_each_entry_safe() still covers the\nlock-held free that ba59fb027307 (\"sctp: walk the list of asoc\nsafely\") was added for.","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4910280503f3af2857d5aa77e35b22d93a8960a8"},{"fixed":"f3a3f0b406b4b7eb3cea35a23fa2bf170848b104"},{"fixed":"0dbc8cde64280fc37cdd678cced34eaf96cfb197"},{"fixed":"0c7b55974f97b78d1109025eadf084e74cbf330f"},{"fixed":"1bfb06ecb00f7fdf35dba8e8f2877346cbe5e078"},{"fixed":"6187a172d6ed57d6b2c327836e4407c6456e639d"},{"fixed":"c9dadb31f36045a8cb65df4bd75e7237ef21a4b5"},{"fixed":"bf0f40d8107e2ce827521968dc6926f3e13728ae"},{"fixed":"abb5f36771cc4c05899b34000829a787572a8817"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46227.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":"6.6.140"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.90"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.32"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46227.json"}}],"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0c7b55974f97b78d1109025eadf084e74cbf330f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0dbc8cde64280fc37cdd678cced34eaf96cfb197"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1bfb06ecb00f7fdf35dba8e8f2877346cbe5e078"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6187a172d6ed57d6b2c327836e4407c6456e639d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/abb5f36771cc4c05899b34000829a787572a8817"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bf0f40d8107e2ce827521968dc6926f3e13728ae"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c9dadb31f36045a8cb65df4bd75e7237ef21a4b5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f3a3f0b406b4b7eb3cea35a23fa2bf170848b104"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46227.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:26462"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:26515"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:26535"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:26563"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27731"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27735"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33899"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:34094"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36018"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36348"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36349"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36956"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-46227"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46227.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46227"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2482564"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46227.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}