{"id":"CVE-2026-23064","state":"PUBLISHED","title":"net/sched: act_ife: avoid possible NULL deref","description":"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 <TASK>\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","publishedAt":"2026-02-04T16:07:46.329Z","updatedAt":"2026-05-11T21:59:18.219Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c","status":"affected","lessThan":"4ef2c77851676b7ed106f0c47755bee9eeec9a40","versionType":"git"},{"version":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c","status":"affected","lessThan":"dd9442aedbeae87c44cc64c0ee41abd296dc008b","versionType":"git"},{"version":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c","status":"affected","lessThan":"1440d749fe49c8665da6f744323b1671d25a56a0","versionType":"git"},{"version":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c","status":"affected","lessThan":"03710cebfc0bcfe247a9e04381e79ea33896e278","versionType":"git"},{"version":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c","status":"affected","lessThan":"374915dfc932adf57712df3be010667fd1190e3c","versionType":"git"},{"version":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c","status":"affected","lessThan":"6c75fed55080014545f262b7055081cec4768b20","versionType":"git"},{"version":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c","status":"affected","lessThan":"27880b0b0d35ad1c98863d09788254e36f874968","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/act_ife.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.11","versionType":"semver"},{"version":"5.10.249","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.199","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.162","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.122","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.68","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.8","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/act_ife.c"]}],"references":["https://git.kernel.org/stable/c/4ef2c77851676b7ed106f0c47755bee9eeec9a40","https://git.kernel.org/stable/c/dd9442aedbeae87c44cc64c0ee41abd296dc008b","https://git.kernel.org/stable/c/1440d749fe49c8665da6f744323b1671d25a56a0","https://git.kernel.org/stable/c/03710cebfc0bcfe247a9e04381e79ea33896e278","https://git.kernel.org/stable/c/374915dfc932adf57712df3be010667fd1190e3c","https://git.kernel.org/stable/c/6c75fed55080014545f262b7055081cec4768b20","https://git.kernel.org/stable/c/27880b0b0d35ad1c98863d09788254e36f874968"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23064.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23064","state":"PUBLISHED","datePublished":"2026-02-04T16:07:46.329Z","dateUpdated":"2026-05-11T21:59:18.219Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:45.953Z"},"containers":{"cna":{"title":"net/sched: act_ife: avoid possible NULL deref","descriptions":[{"lang":"en","value":"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 <TASK>\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"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c","status":"affected","lessThan":"4ef2c77851676b7ed106f0c47755bee9eeec9a40","versionType":"git"},{"version":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c","status":"affected","lessThan":"dd9442aedbeae87c44cc64c0ee41abd296dc008b","versionType":"git"},{"version":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c","status":"affected","lessThan":"1440d749fe49c8665da6f744323b1671d25a56a0","versionType":"git"},{"version":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c","status":"affected","lessThan":"03710cebfc0bcfe247a9e04381e79ea33896e278","versionType":"git"},{"version":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c","status":"affected","lessThan":"374915dfc932adf57712df3be010667fd1190e3c","versionType":"git"},{"version":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c","status":"affected","lessThan":"6c75fed55080014545f262b7055081cec4768b20","versionType":"git"},{"version":"295a6e06d21e1f469c9f38b00125a13b60ad4e7c","status":"affected","lessThan":"27880b0b0d35ad1c98863d09788254e36f874968","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/act_ife.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.11","versionType":"semver"},{"version":"5.10.249","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.199","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.162","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.122","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.68","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.8","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/act_ife.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/4ef2c77851676b7ed106f0c47755bee9eeec9a40"},{"url":"https://git.kernel.org/stable/c/dd9442aedbeae87c44cc64c0ee41abd296dc008b"},{"url":"https://git.kernel.org/stable/c/1440d749fe49c8665da6f744323b1671d25a56a0"},{"url":"https://git.kernel.org/stable/c/03710cebfc0bcfe247a9e04381e79ea33896e278"},{"url":"https://git.kernel.org/stable/c/374915dfc932adf57712df3be010667fd1190e3c"},{"url":"https://git.kernel.org/stable/c/6c75fed55080014545f262b7055081cec4768b20"},{"url":"https://git.kernel.org/stable/c/27880b0b0d35ad1c98863d09788254e36f874968"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:59:18.219Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"5.10.249"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"5.15.199"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.1.162"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.6.122"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.12.68"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.18.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}