FKIE_CVE-2026-23064

Vulnerability from fkie_nvd - Published: 2026-02-04 17:16 - Updated: 2026-03-13 21:28
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/03710cebfc0bcfe247a9e04381e79ea33896e278Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1440d749fe49c8665da6f744323b1671d25a56a0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/27880b0b0d35ad1c98863d09788254e36f874968Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/374915dfc932adf57712df3be010667fd1190e3cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4ef2c77851676b7ed106f0c47755bee9eeec9a40Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6c75fed55080014545f262b7055081cec4768b20Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dd9442aedbeae87c44cc64c0ee41abd296dc008bPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
To clipboard 

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  "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"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet/sched: act_ife: evitar posible desreferencia de NULL\n\ntcf_ife_encode() debe asegurarse de que ife_encode() no devuelva NULL.\n\nsyzbot inform\u00f3:\n\nOops: fallo de protecci\u00f3n general, probablemente para direcci\u00f3n no can\u00f3nica 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI\nKASAN: desreferencia de puntero nulo en el rango [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 No contaminado syzkaller #0 PREEMPT(full)\nTraza de Llamada:\n \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": "CVE-2026-23064",
  "lastModified": "2026-03-13T21:28:09.897",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-02-04T17:16:17.093",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-476"
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      "source": "nvd@nist.gov",
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}


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  • 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.
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  • 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.