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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    Linux Linux Affected: 4.11
Unaffected: 0 , < 4.11 (semver)
Unaffected: 5.10.249 , ≤ 5.10.* (semver)
Unaffected: 5.15.199 , ≤ 5.15.* (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.122 , ≤ 6.6.* (semver)
Unaffected: 6.12.68 , ≤ 6.12.* (semver)
Unaffected: 6.18.8 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sched/act_ife.c"
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              "lessThanOrEqual": "5.10.*",
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              "lessThanOrEqual": "6.12.*",
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              "versionType": "semver"
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
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      ],
      "cpeApplicability": [
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              "cpeMatch": [
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              "operator": "OR"
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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"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/4ef2c77851676b7ed106f0c47755bee9eeec9a40"
        },
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          "url": "https://git.kernel.org/stable/c/dd9442aedbeae87c44cc64c0ee41abd296dc008b"
        },
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          "url": "https://git.kernel.org/stable/c/1440d749fe49c8665da6f744323b1671d25a56a0"
        },
        {
          "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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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "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",
  "dataVersion": "5.2",
  "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

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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.



Detection rules are retrieved from Rulezet.