GHSA-949X-GVHG-PGGC
Vulnerability from github – Published: 2026-02-04 18:30 – Updated: 2026-02-06 18:30In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_ife: avoid possible NULL deref
tcf_ife_encode() must make sure ife_encode() does not return NULL.
syzbot reported:
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:ife_tlv_meta_encode+0x41/0xa0 net/ife/ife.c:166 CPU: 3 UID: 0 PID: 8990 Comm: syz.0.696 Not tainted syzkaller #0 PREEMPT(full) Call Trace: ife_encode_meta_u32+0x153/0x180 net/sched/act_ife.c:101 tcf_ife_encode net/sched/act_ife.c:841 [inline] tcf_ife_act+0x1022/0x1de0 net/sched/act_ife.c:877 tc_act include/net/tc_wrapper.h:130 [inline] tcf_action_exec+0x1c0/0xa20 net/sched/act_api.c:1152 tcf_exts_exec include/net/pkt_cls.h:349 [inline] mall_classify+0x1a0/0x2a0 net/sched/cls_matchall.c:42 tc_classify include/net/tc_wrapper.h:197 [inline] __tcf_classify net/sched/cls_api.c:1764 [inline] tcf_classify+0x7f2/0x1380 net/sched/cls_api.c:1860 multiq_classify net/sched/sch_multiq.c:39 [inline] multiq_enqueue+0xe0/0x510 net/sched/sch_multiq.c:66 dev_qdisc_enqueue+0x45/0x250 net/core/dev.c:4147 __dev_xmit_skb net/core/dev.c:4262 [inline] __dev_queue_xmit+0x2998/0x46c0 net/core/dev.c:4798
{
"affected": [],
"aliases": [
"CVE-2026-23064"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-04T17:16:17Z",
"severity": null
},
"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",
"id": "GHSA-949x-gvhg-pggc",
"modified": "2026-02-06T18:30:30Z",
"published": "2026-02-04T18:30:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23064"
},
{
"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"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
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- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.