{"id":"CVE-2026-23064","summary":"net/sched: act_ife: avoid possible NULL deref","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_ife: avoid possible NULL deref\n\ntcf_ife_encode() must make sure ife_encode() does not return NULL.\n\nsyzbot reported:\n\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n RIP: 0010:ife_tlv_meta_encode+0x41/0xa0 net/ife/ife.c:166\nCPU: 3 UID: 0 PID: 8990 Comm: syz.0.696 Not tainted syzkaller #0 PREEMPT(full)\nCall Trace:\n \u003cTASK\u003e\n  ife_encode_meta_u32+0x153/0x180 net/sched/act_ife.c:101\n  tcf_ife_encode net/sched/act_ife.c:841 [inline]\n  tcf_ife_act+0x1022/0x1de0 net/sched/act_ife.c:877\n  tc_act include/net/tc_wrapper.h:130 [inline]\n  tcf_action_exec+0x1c0/0xa20 net/sched/act_api.c:1152\n  tcf_exts_exec include/net/pkt_cls.h:349 [inline]\n  mall_classify+0x1a0/0x2a0 net/sched/cls_matchall.c:42\n  tc_classify include/net/tc_wrapper.h:197 [inline]\n  __tcf_classify net/sched/cls_api.c:1764 [inline]\n  tcf_classify+0x7f2/0x1380 net/sched/cls_api.c:1860\n  multiq_classify net/sched/sch_multiq.c:39 [inline]\n  multiq_enqueue+0xe0/0x510 net/sched/sch_multiq.c:66\n  dev_qdisc_enqueue+0x45/0x250 net/core/dev.c:4147\n  __dev_xmit_skb net/core/dev.c:4262 [inline]\n  __dev_queue_xmit+0x2998/0x46c0 net/core/dev.c:4798","modified":"2026-04-02T17:30:13.237140Z","published":"2026-02-04T16:07:46.329Z","related":["SUSE-SU-2026:0962-1","SUSE-SU-2026:1078-1","SUSE-SU-2026:1081-1","SUSE-SU-2026:20667-1","SUSE-SU-2026:20720-1","SUSE-SU-2026:20838-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1","SUSE-SU-2026:20931-1","openSUSE-SU-2026:20416-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23064.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/03710cebfc0bcfe247a9e04381e79ea33896e278"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1440d749fe49c8665da6f744323b1671d25a56a0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/27880b0b0d35ad1c98863d09788254e36f874968"},{"type":"WEB","url":"https://git.kernel.org/stable/c/374915dfc932adf57712df3be010667fd1190e3c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4ef2c77851676b7ed106f0c47755bee9eeec9a40"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6c75fed55080014545f262b7055081cec4768b20"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dd9442aedbeae87c44cc64c0ee41abd296dc008b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23064.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23064"},{"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":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c"},{"fixed":"4ef2c77851676b7ed106f0c47755bee9eeec9a40"},{"fixed":"dd9442aedbeae87c44cc64c0ee41abd296dc008b"},{"fixed":"1440d749fe49c8665da6f744323b1671d25a56a0"},{"fixed":"03710cebfc0bcfe247a9e04381e79ea33896e278"},{"fixed":"374915dfc932adf57712df3be010667fd1190e3c"},{"fixed":"6c75fed55080014545f262b7055081cec4768b20"},{"fixed":"27880b0b0d35ad1c98863d09788254e36f874968"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23064.json"}}],"schema_version":"1.7.5"}