CVE-2026-23064 (GCVE-0-2026-23064)
Vulnerability from cvelistv5 – Published: 2026-02-04 16:07 – Updated: 2026-02-09 08:38
VLAI?
Title
net/sched: act_ife: avoid possible NULL deref
Summary
In 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:
<TASK>
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
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux |
Affected:
295a6e06d21e1f469c9f38b00125a13b60ad4e7c , < 4ef2c77851676b7ed106f0c47755bee9eeec9a40
(git)
Affected: 295a6e06d21e1f469c9f38b00125a13b60ad4e7c , < dd9442aedbeae87c44cc64c0ee41abd296dc008b (git) Affected: 295a6e06d21e1f469c9f38b00125a13b60ad4e7c , < 1440d749fe49c8665da6f744323b1671d25a56a0 (git) Affected: 295a6e06d21e1f469c9f38b00125a13b60ad4e7c , < 03710cebfc0bcfe247a9e04381e79ea33896e278 (git) Affected: 295a6e06d21e1f469c9f38b00125a13b60ad4e7c , < 374915dfc932adf57712df3be010667fd1190e3c (git) Affected: 295a6e06d21e1f469c9f38b00125a13b60ad4e7c , < 6c75fed55080014545f262b7055081cec4768b20 (git) Affected: 295a6e06d21e1f469c9f38b00125a13b60ad4e7c , < 27880b0b0d35ad1c98863d09788254e36f874968 (git) |
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{
"containers": {
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{
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"product": "Linux",
"programFiles": [
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"versions": [
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},
{
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"version": "5.10.249",
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},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.199",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.162",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.122",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.68",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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"nodes": [
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"negate": false,
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}
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"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 \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"
}
],
"providerMetadata": {
"dateUpdated": "2026-02-09T08:38:03.299Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"url": "https://git.kernel.org/stable/c/dd9442aedbeae87c44cc64c0ee41abd296dc008b"
},
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{
"url": "https://git.kernel.org/stable/c/03710cebfc0bcfe247a9e04381e79ea33896e278"
},
{
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{
"url": "https://git.kernel.org/stable/c/6c75fed55080014545f262b7055081cec4768b20"
},
{
"url": "https://git.kernel.org/stable/c/27880b0b0d35ad1c98863d09788254e36f874968"
}
],
"title": "net/sched: act_ife: avoid possible NULL deref",
"x_generator": {
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}
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"assignerShortName": "Linux",
"cveId": "CVE-2026-23064",
"datePublished": "2026-02-04T16:07:46.329Z",
"dateReserved": "2026-01-13T15:37:45.953Z",
"dateUpdated": "2026-02-09T08:38:03.299Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
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"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-23064\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-04T17:16:17.093\",\"lastModified\":\"2026-02-06T17:16:22.817\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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 \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\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/03710cebfc0bcfe247a9e04381e79ea33896e278\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1440d749fe49c8665da6f744323b1671d25a56a0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/27880b0b0d35ad1c98863d09788254e36f874968\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/374915dfc932adf57712df3be010667fd1190e3c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4ef2c77851676b7ed106f0c47755bee9eeec9a40\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6c75fed55080014545f262b7055081cec4768b20\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dd9442aedbeae87c44cc64c0ee41abd296dc008b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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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.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- 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.
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