{"id":"CVE-2026-64189","summary":"netfilter: ipset: fix race between dump and ip_set_list resize","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ipset: fix race between dump and ip_set_list resize\n\nThe release path of ip_set_dump_do() and ip_set_dump_done() read\ninst-\u003eip_set_list via ip_set_ref_netlink(), a plain rcu_dereference_raw()\nof the array pointer. These run from netlink_recvmsg() without the nfnl\nmutex and without an RCU read-side critical section.\n\nA concurrent ip_set_create() can grow the array: it publishes the new\narray, calls synchronize_net() and then kvfree()s the old one. Since the\ndump paths read the array outside any RCU reader, synchronize_net() does\nnot wait for them and the old array can be freed while they still index\ninto it, causing a use-after-free.\n\nThe dumped set itself stays pinned via set-\u003eref_netlink, so only the\narray load needs protecting. Take rcu_read_lock() around it, matching\nip_set_get_byname() and __ip_set_put_byindex().\n\n  BUG: KASAN: slab-use-after-free in ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)\n  Read of size 8 at addr ffff88800b5c4018 by task exploit/150\n  Call Trace:\n   ...\n   kasan_report (mm/kasan/report.c:595)\n   ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)\n   netlink_dump (net/netlink/af_netlink.c:2325)\n   netlink_recvmsg (net/netlink/af_netlink.c:1976)\n   sock_recvmsg (net/socket.c:1159)\n   __sys_recvfrom (net/socket.c:2315)\n   ...\n  Oops: general protection fault, probably for non-canonical address ... KASAN NOPTI\n  KASAN: maybe wild-memory-access in range [0x02d6...d0-0x02d6...d7]\n  RIP: 0010:ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1698)\n  Kernel panic - not syncing: Fatal exception","modified":"2026-10-17T02:30:41.419972875Z","published":"2026-07-20T16:27:47.767Z","related":["ALSA-2026:59723","ALSA-2026:59737","ALSA-2026:59821","ALSA-2026:61887","SUSE-SU-2026:23066-1","SUSE-SU-2026:23068-1","SUSE-SU-2026:23193-1","SUSE-SU-2026:23194-1","SUSE-SU-2026:23221-1","SUSE-SU-2026:23231-1","SUSE-SU-2026:23237-1","SUSE-SU-2026:23241-1","SUSE-SU-2026:23244-1","SUSE-SU-2026:23994-1","SUSE-SU-2026:23995-1","SUSE-SU-2026:23996-1","SUSE-SU-2026:23997-1","SUSE-SU-2026:23998-1","SUSE-SU-2026:23999-1","SUSE-SU-2026:24000-1","SUSE-SU-2026:24001-1","SUSE-SU-2026:24002-1","SUSE-SU-2026:24003-1","SUSE-SU-2026:24004-1","SUSE-SU-2026:24005-1","SUSE-SU-2026:24006-1","SUSE-SU-2026:24007-1","SUSE-SU-2026:24008-1","SUSE-SU-2026:24009-1","SUSE-SU-2026:24010-1","SUSE-SU-2026:24016-1","SUSE-SU-2026:24023-1","SUSE-SU-2026:24024-1","SUSE-SU-2026:24025-1","SUSE-SU-2026:24026-1","SUSE-SU-2026:24027-1","SUSE-SU-2026:24028-1","SUSE-SU-2026:24029-1","SUSE-SU-2026:24030-1","SUSE-SU-2026:24031-1","SUSE-SU-2026:24032-1","SUSE-SU-2026:24033-1","SUSE-SU-2026:24034-1","SUSE-SU-2026:24035-1","SUSE-SU-2026:24036-1","SUSE-SU-2026:24037-1","SUSE-SU-2026:24038-1","SUSE-SU-2026:24041-1","SUSE-SU-2026:24042-1","SUSE-SU-2026:24043-1","SUSE-SU-2026:24044-1","SUSE-SU-2026:24045-1","SUSE-SU-2026:24046-1","SUSE-SU-2026:24047-1","SUSE-SU-2026:24048-1","SUSE-SU-2026:24049-1","SUSE-SU-2026:24050-1","SUSE-SU-2026:24051-1","SUSE-SU-2026:24052-1","SUSE-SU-2026:24053-1","SUSE-SU-2026:24054-1","SUSE-SU-2026:24059-1","SUSE-SU-2026:24060-1","SUSE-SU-2026:24061-1","SUSE-SU-2026:24062-1","SUSE-SU-2026:24063-1","SUSE-SU-2026:24064-1","SUSE-SU-2026:24065-1","SUSE-SU-2026:24066-1","SUSE-SU-2026:24067-1","SUSE-SU-2026:24068-1","SUSE-SU-2026:24069-1","SUSE-SU-2026:24070-1","SUSE-SU-2026:24071-1","SUSE-SU-2026:24072-1","SUSE-SU-2026:24075-1","SUSE-SU-2026:24076-1","SUSE-SU-2026:24077-1","SUSE-SU-2026:24078-1","SUSE-SU-2026:24079-1","SUSE-SU-2026:24080-1","SUSE-SU-2026:24081-1","SUSE-SU-2026:24082-1","SUSE-SU-2026:24083-1","SUSE-SU-2026:24084-1","SUSE-SU-2026:24085-1","SUSE-SU-2026:24086-1","SUSE-SU-2026:24087-1","SUSE-SU-2026:24088-1","SUSE-SU-2026:24089-1","SUSE-SU-2026:24090-1","SUSE-SU-2026:24092-1","SUSE-SU-2026:24093-1","SUSE-SU-2026:24095-1","SUSE-SU-2026:24097-1","SUSE-SU-2026:24098-1","SUSE-SU-2026:24099-1","SUSE-SU-2026:24100-1","SUSE-SU-2026:24101-1","SUSE-SU-2026:24102-1","SUSE-SU-2026:24103-1","SUSE-SU-2026:24104-1","SUSE-SU-2026:24105-1","SUSE-SU-2026:24106-1","SUSE-SU-2026:24107-1","SUSE-SU-2026:24108-1","SUSE-SU-2026:24160-1","SUSE-SU-2026:24161-1","SUSE-SU-2026:24163-1","SUSE-SU-2026:24164-1","SUSE-SU-2026:24165-1","SUSE-SU-2026:24166-1","SUSE-SU-2026:24167-1","SUSE-SU-2026:24168-1","SUSE-SU-2026:24169-1","SUSE-SU-2026:24170-1","SUSE-SU-2026:24171-1","SUSE-SU-2026:24172-1","SUSE-SU-2026:24173-1","SUSE-SU-2026:24174-1","SUSE-SU-2026:24175-1","SUSE-SU-2026:3593-1","SUSE-SU-2026:3595-1","SUSE-SU-2026:3602-1","SUSE-SU-2026:3616-1","SUSE-SU-2026:3617-1","SUSE-SU-2026:3790-1","SUSE-SU-2026:3810-1","SUSE-SU-2026:4415-1","SUSE-SU-2026:4471-1","SUSE-SU-2026:4489-1","SUSE-SU-2026:4498-1","SUSE-SU-2026:4507-1","SUSE-SU-2026:4513-1","SUSE-SU-2026:4516-1","SUSE-SU-2026:4518-1","SUSE-SU-2026:4519-1","SUSE-SU-2026:4537-1","openSUSE-SU-2026:11476-1","openSUSE-SU-2026:21555-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64189.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1bc67c3fc98e9fc07032cc56afcdbc690c47d11e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7cd9103283b26b917360ec99d7d2f2d761bcf1ab"},{"type":"WEB","url":"https://git.kernel.org/stable/c/81d54c766337b923eec26da0a13406760b091093"},{"type":"WEB","url":"https://git.kernel.org/stable/c/96fbafc20ebd9a613736c2998b89c539fe3042f5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a7a299277959683204d73333c32c092fd69327d4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e8ee198bbc04a32d336e79160fde980e0235b39f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ff86ea9b7fdf70564e60436fbee68c96bc459943"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64189.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64189"},{"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":"8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7"},{"fixed":"a7a299277959683204d73333c32c092fd69327d4"},{"fixed":"1bc67c3fc98e9fc07032cc56afcdbc690c47d11e"},{"fixed":"e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710"},{"fixed":"96fbafc20ebd9a613736c2998b89c539fe3042f5"},{"fixed":"ff86ea9b7fdf70564e60436fbee68c96bc459943"},{"fixed":"81d54c766337b923eec26da0a13406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