Vulnerability-Lookup

FKIE_CVE-2024-40957

Vulnerability from fkie_nvd - Published: 2024-07-12 13:15 - Updated: 2026-08-04 11:19

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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: seg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors input_action_end_dx4() and input_action_end_dx6() are called NF_HOOK() for PREROUTING hook, in PREROUTING hook, we should passing a valid indev, and a NULL outdev to NF_HOOK(), otherwise may trigger a NULL pointer dereference, as below: [74830.647293] BUG: kernel NULL pointer dereference, address: 0000000000000090 [74830.655633] #PF: supervisor read access in kernel mode [74830.657888] #PF: error_code(0x0000) - not-present page [74830.659500] PGD 0 P4D 0 [74830.660450] Oops: 0000 [#1] PREEMPT SMP PTI ... [74830.664953] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 [74830.666569] RIP: 0010:rpfilter_mt+0x44/0x15e [ipt_rpfilter] ... [74830.689725] Call Trace: [74830.690402] <IRQ> [74830.690953] ? show_trace_log_lvl+0x1c4/0x2df [74830.692020] ? show_trace_log_lvl+0x1c4/0x2df [74830.693095] ? ipt_do_table+0x286/0x710 [ip_tables] [74830.694275] ? __die_body.cold+0x8/0xd [74830.695205] ? page_fault_oops+0xac/0x140 [74830.696244] ? exc_page_fault+0x62/0x150 [74830.697225] ? asm_exc_page_fault+0x22/0x30 [74830.698344] ? rpfilter_mt+0x44/0x15e [ipt_rpfilter] [74830.699540] ipt_do_table+0x286/0x710 [ip_tables] [74830.700758] ? ip6_route_input+0x19d/0x240 [74830.701752] nf_hook_slow+0x3f/0xb0 [74830.702678] input_action_end_dx4+0x19b/0x1e0 [74830.703735] ? input_action_end_t+0xe0/0xe0 [74830.704734] seg6_local_input_core+0x2d/0x60 [74830.705782] lwtunnel_input+0x5b/0xb0 [74830.706690] __netif_receive_skb_one_core+0x63/0xa0 [74830.707825] process_backlog+0x99/0x140 [74830.709538] __napi_poll+0x2c/0x160 [74830.710673] net_rx_action+0x296/0x350 [74830.711860] __do_softirq+0xcb/0x2ac [74830.713049] do_softirq+0x63/0x90 input_action_end_dx4() passing a NULL indev to NF_HOOK(), and finally trigger a NULL dereference in rpfilter_mt()->rpfilter_is_loopback(): static bool rpfilter_is_loopback(const struct sk_buff *skb, const struct net_device *in) { // in is NULL return skb->pkt_type == PACKET_LOOPBACK || in->flags & IFF_LOOPBACK; }

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/561475d53aa7e4511ee7cdba8728ded81cf1db1c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9a3bc8d16e0aacd65c31aaf23a2bced3288a7779	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/af90e3d73dc45778767b2fb6e7edd57ebe34380d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d62df86c172033679d744f07d89e93e367dd11f6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ec4d970b597ee5e17b0d8d73b7875197ce9a04d4	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/561475d53aa7e4511ee7cdba8728ded81cf1db1c	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/9a3bc8d16e0aacd65c31aaf23a2bced3288a7779	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/af90e3d73dc45778767b2fb6e7edd57ebe34380d	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/d62df86c172033679d744f07d89e93e367dd11f6	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/ec4d970b597ee5e17b0d8d73b7875197ce9a04d4	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.10
linux	linux_kernel	6.10
linux	linux_kernel	6.10
linux	linux_kernel	6.10

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/seg6_local.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "af90e3d73dc45778767b2fb6e7edd57ebe34380d",
              "status": "affected",
              "version": "7a3f5b0de3647c854e34269c3332d7a1e902901a",
              "versionType": "git"
            },
            {
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              "versionType": "git"
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              "versionType": "git"
            },
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "9a3bc8d16e0aacd65c31aaf23a2bced3288a7779",
              "status": "affected",
              "version": "7a3f5b0de3647c854e34269c3332d7a1e902901a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/seg6_local.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.162",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.9.*",
              "status": "unaffected",
              "version": "6.9.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.10",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4626E4B7-D5F4-42CC-93A8-B73E6384273F",
              "versionEndExcluding": "5.15.162",
              "versionStartIncluding": "5.15",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "61E887B4-732A-40D2-9983-CC6F281EBFB7",
              "versionEndExcluding": "6.1.96",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E1046C95-860A-45B0-B718-2B29F65BFF10",
              "versionEndExcluding": "6.6.36",
              "versionStartIncluding": "6.2",
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            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0A047AF2-94AC-4A3A-B32D-6AB930D8EF1C",
              "versionEndExcluding": "6.9.7",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "2EBB4392-5FA6-4DA9-9772-8F9C750109FA",
              "vulnerable": true
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "331C2F14-12C7-45D5-893D-8C52EE38EA10",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "3173713D-909A-4DD3-9DD4-1E171EB057EE",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "79F18AFA-40F7-43F0-BA30-7BDB65F918B9",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nseg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors\n\ninput_action_end_dx4() and input_action_end_dx6() are called NF_HOOK() for\nPREROUTING hook, in PREROUTING hook, we should passing a valid indev,\nand a NULL outdev to NF_HOOK(), otherwise may trigger a NULL pointer\ndereference, as below:\n\n    [74830.647293] BUG: kernel NULL pointer dereference, address: 0000000000000090\n    [74830.655633] #PF: supervisor read access in kernel mode\n    [74830.657888] #PF: error_code(0x0000) - not-present page\n    [74830.659500] PGD 0 P4D 0\n    [74830.660450] Oops: 0000 [#1] PREEMPT SMP PTI\n    ...\n    [74830.664953] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011\n    [74830.666569] RIP: 0010:rpfilter_mt+0x44/0x15e [ipt_rpfilter]\n    ...\n    [74830.689725] Call Trace:\n    [74830.690402]  \u003cIRQ\u003e\n    [74830.690953]  ? show_trace_log_lvl+0x1c4/0x2df\n    [74830.692020]  ? show_trace_log_lvl+0x1c4/0x2df\n    [74830.693095]  ? ipt_do_table+0x286/0x710 [ip_tables]\n    [74830.694275]  ? __die_body.cold+0x8/0xd\n    [74830.695205]  ? page_fault_oops+0xac/0x140\n    [74830.696244]  ? exc_page_fault+0x62/0x150\n    [74830.697225]  ? asm_exc_page_fault+0x22/0x30\n    [74830.698344]  ? rpfilter_mt+0x44/0x15e [ipt_rpfilter]\n    [74830.699540]  ipt_do_table+0x286/0x710 [ip_tables]\n    [74830.700758]  ? ip6_route_input+0x19d/0x240\n    [74830.701752]  nf_hook_slow+0x3f/0xb0\n    [74830.702678]  input_action_end_dx4+0x19b/0x1e0\n    [74830.703735]  ? input_action_end_t+0xe0/0xe0\n    [74830.704734]  seg6_local_input_core+0x2d/0x60\n    [74830.705782]  lwtunnel_input+0x5b/0xb0\n    [74830.706690]  __netif_receive_skb_one_core+0x63/0xa0\n    [74830.707825]  process_backlog+0x99/0x140\n    [74830.709538]  __napi_poll+0x2c/0x160\n    [74830.710673]  net_rx_action+0x296/0x350\n    [74830.711860]  __do_softirq+0xcb/0x2ac\n    [74830.713049]  do_softirq+0x63/0x90\n\ninput_action_end_dx4() passing a NULL indev to NF_HOOK(), and finally\ntrigger a NULL dereference in rpfilter_mt()-\u003erpfilter_is_loopback():\n\n    static bool\n    rpfilter_is_loopback(const struct sk_buff *skb,\n          \t       const struct net_device *in)\n    {\n            // in is NULL\n            return skb-\u003epkt_type == PACKET_LOOPBACK ||\n          \t in-\u003eflags \u0026 IFF_LOOPBACK;\n    }"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: seg6: corrige el paso de par\u00e1metros al llamar a NF_HOOK() en los comportamientos End.DX4 y End.DX6 input_action_end_dx4() y input_action_end_dx6() se llaman NF_HOOK() para el gancho PREROUTING, en el gancho PREROUTING , debemos pasar un indev v\u00e1lido y un outdev NULL a NF_HOOK(); de lo contrario, podemos desencadenar una desreferencia del puntero NULL, como se muestra a continuaci\u00f3n: [74830.647293] ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 00000000000000090 [74830.655633] #PF: acceso de lectura del supervisor en modo kernel [74830.657888] #PF: error_code(0x0000) - p\u00e1gina no presente [74830.659500] PGD 0 P4D 0 [74830.660450] Ups: 0000 [#1] PREEMPT SMP PTI... [74830.664953] Nombre de hardware: Red Hat KVM , BIOS 0.5.1 01/01/2011 [74830.666569] RIP: 0010:rpfilter_mt+0x44/0x15e [ipt_rpfilter] ... [74830.689725] Seguimiento de llamadas: [74830.690402]  [74830.690953] ? show_trace_log_lvl+0x1c4/0x2df [74830.692020] ? show_trace_log_lvl+0x1c4/0x2df [74830.693095] ? ipt_do_table+0x286/0x710 [ip_tables] [74830.694275] ? __die_body.cold+0x8/0xd [74830.695205] ? page_fault_oops+0xac/0x140 [74830.696244] ? exc_page_fault+0x62/0x150 [74830.697225] ? asm_exc_page_fault+0x22/0x30 [74830.698344] ? rpfilter_mt+0x44/0x15e [ipt_rpfilter] [74830.699540] ipt_do_table+0x286/0x710 [ip_tables] [74830.700758] ? ip6_route_input+0x19d/0x240 [74830.701752] nf_hook_slow+0x3f/0xb0 [74830.702678] input_action_end_dx4+0x19b/0x1e0 [74830.703735] ? input_action_end_t+0xe0/0xe0 [74830.704734] seg6_local_input_core+0x2d/0x60 [74830.705782] lwtunnel_input+0x5b/0xb0 [74830.706690] __netif_receive_skb_one_core+0x63/0xa0 830.707825] proceso_atrasado+0x99/0x140 [74830.709538] __napi_poll+0x2c/0x160 [74830.710673] net_rx_action+ 0x296/0x350 [74830.711860] __do_softirq+0xcb/0x2ac [74830.713049] do_softirq+0x63/0x90 input_action_end_dx4() pasando un indev NULL a NF_HOOK(), y finalmente activa una desreferencia NULL en rpfilter_mt()-\u0026gt;rpfilter_is_lo opback(): bool est\u00e1tico rpfilter_is_loopback (const struct sk_buff *skb, const struct net_device *in) { // in es NULL return skb-\u0026gt;pkt_type == PACKET_LOOPBACK || en-\u0026gt;flags \u0026amp; IFF_LOOPBACK; }"
    }
  ],
  "id": "CVE-2024-40957",
  "lastModified": "2026-08-04T11:19:09.797",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "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"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-40957",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T17:03:38.761289Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-07-12T13:15:17.823",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/561475d53aa7e4511ee7cdba8728ded81cf1db1c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/9a3bc8d16e0aacd65c31aaf23a2bced3288a7779"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/af90e3d73dc45778767b2fb6e7edd57ebe34380d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d62df86c172033679d744f07d89e93e367dd11f6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ec4d970b597ee5e17b0d8d73b7875197ce9a04d4"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/561475d53aa7e4511ee7cdba8728ded81cf1db1c"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/9a3bc8d16e0aacd65c31aaf23a2bced3288a7779"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/af90e3d73dc45778767b2fb6e7edd57ebe34380d"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d62df86c172033679d744f07d89e93e367dd11f6"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ec4d970b597ee5e17b0d8d73b7875197ce9a04d4"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2024-40957 (GCVE-0-2024-40957)

Vulnerability from cvelistv5 – Published: 2024-07-12 12:31 – Updated: 2026-08-05 11:34

Title

seg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors

Summary

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 17:03 UTC

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/af90e3d73dc457787…
https://git.kernel.org/stable/c/ec4d970b597ee5e17…
https://git.kernel.org/stable/c/d62df86c172033679…
https://git.kernel.org/stable/c/561475d53aa7e4511…
https://git.kernel.org/stable/c/9a3bc8d16e0aacd65…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7a3f5b0de3647c854e34269c3332d7a1e902901a , < af90e3d73dc45778767b2fb6e7edd57ebe34380d (git) Affected: 7a3f5b0de3647c854e34269c3332d7a1e902901a , < ec4d970b597ee5e17b0d8d73b7875197ce9a04d4 (git) Affected: 7a3f5b0de3647c854e34269c3332d7a1e902901a , < d62df86c172033679d744f07d89e93e367dd11f6 (git) Affected: 7a3f5b0de3647c854e34269c3332d7a1e902901a , < 561475d53aa7e4511ee7cdba8728ded81cf1db1c (git) Affected: 7a3f5b0de3647c854e34269c3332d7a1e902901a , < 9a3bc8d16e0aacd65c31aaf23a2bced3288a7779 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 5.15.162 , ≤ 5.15.* (semver) Unaffected: 6.1.96 , ≤ 6.1.* (semver) Unaffected: 6.6.36 , ≤ 6.6.* (semver) Unaffected: 6.9.7 , ≤ 6.9.* (semver) Unaffected: 6.10 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T21:58:21.536Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            "url": "https://git.kernel.org/stable/c/af90e3d73dc45778767b2fb6e7edd57ebe34380d"
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            "url": "https://git.kernel.org/stable/c/ec4d970b597ee5e17b0d8d73b7875197ce9a04d4"
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            "url": "https://git.kernel.org/stable/c/d62df86c172033679d744f07d89e93e367dd11f6"
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            "url": "https://git.kernel.org/stable/c/561475d53aa7e4511ee7cdba8728ded81cf1db1c"
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            "url": "https://git.kernel.org/stable/c/9a3bc8d16e0aacd65c31aaf23a2bced3288a7779"
          },
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            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
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        ],
        "title": "CVE Program Container"
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      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-40957",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
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                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T17:03:38.761289Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:34:24.035Z",
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          "shortName": "CISA-ADP"
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          "product": "Linux",
          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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            {
              "lessThan": "d62df86c172033679d744f07d89e93e367dd11f6",
              "status": "affected",
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              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "9a3bc8d16e0aacd65c31aaf23a2bced3288a7779",
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              "version": "7a3f5b0de3647c854e34269c3332d7a1e902901a",
              "versionType": "git"
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          ]
        },
        {
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          "product": "Linux",
          "programFiles": [
            "net/ipv6/seg6_local.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.162",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.9.*",
              "status": "unaffected",
              "version": "6.9.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.10",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.162",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.96",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
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              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nseg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors\n\ninput_action_end_dx4() and input_action_end_dx6() are called NF_HOOK() for\nPREROUTING hook, in PREROUTING hook, we should passing a valid indev,\nand a NULL outdev to NF_HOOK(), otherwise may trigger a NULL pointer\ndereference, as below:\n\n    [74830.647293] BUG: kernel NULL pointer dereference, address: 0000000000000090\n    [74830.655633] #PF: supervisor read access in kernel mode\n    [74830.657888] #PF: error_code(0x0000) - not-present page\n    [74830.659500] PGD 0 P4D 0\n    [74830.660450] Oops: 0000 [#1] PREEMPT SMP PTI\n    ...\n    [74830.664953] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011\n    [74830.666569] RIP: 0010:rpfilter_mt+0x44/0x15e [ipt_rpfilter]\n    ...\n    [74830.689725] Call Trace:\n    [74830.690402]  \u003cIRQ\u003e\n    [74830.690953]  ? show_trace_log_lvl+0x1c4/0x2df\n    [74830.692020]  ? show_trace_log_lvl+0x1c4/0x2df\n    [74830.693095]  ? ipt_do_table+0x286/0x710 [ip_tables]\n    [74830.694275]  ? __die_body.cold+0x8/0xd\n    [74830.695205]  ? page_fault_oops+0xac/0x140\n    [74830.696244]  ? exc_page_fault+0x62/0x150\n    [74830.697225]  ? asm_exc_page_fault+0x22/0x30\n    [74830.698344]  ? rpfilter_mt+0x44/0x15e [ipt_rpfilter]\n    [74830.699540]  ipt_do_table+0x286/0x710 [ip_tables]\n    [74830.700758]  ? ip6_route_input+0x19d/0x240\n    [74830.701752]  nf_hook_slow+0x3f/0xb0\n    [74830.702678]  input_action_end_dx4+0x19b/0x1e0\n    [74830.703735]  ? input_action_end_t+0xe0/0xe0\n    [74830.704734]  seg6_local_input_core+0x2d/0x60\n    [74830.705782]  lwtunnel_input+0x5b/0xb0\n    [74830.706690]  __netif_receive_skb_one_core+0x63/0xa0\n    [74830.707825]  process_backlog+0x99/0x140\n    [74830.709538]  __napi_poll+0x2c/0x160\n    [74830.710673]  net_rx_action+0x296/0x350\n    [74830.711860]  __do_softirq+0xcb/0x2ac\n    [74830.713049]  do_softirq+0x63/0x90\n\ninput_action_end_dx4() passing a NULL indev to NF_HOOK(), and finally\ntrigger a NULL dereference in rpfilter_mt()-\u003erpfilter_is_loopback():\n\n    static bool\n    rpfilter_is_loopback(const struct sk_buff *skb,\n          \t       const struct net_device *in)\n    {\n            // in is NULL\n            return skb-\u003epkt_type == PACKET_LOOPBACK ||\n          \t in-\u003eflags \u0026 IFF_LOOPBACK;\n    }"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The crash is triggered by a received IPv6 packet whose destination matches a configured SRv6 End.DX4/End.DX6 SID, processed in the receive softirq path (`lwtunnel_input` \u2192 `seg6_local_input_core`). No local access or account on the router is needed \u2014 any host able to route a packet to the SID reaches the code.\nAC:L - Once the target runs the affected (supported, documented) SRv6 + netfilter configuration, a single crafted packet deterministically dereferences NULL \u2014 no race, no memory-layout dependence, no information the attacker must first gather. The required rpfilter/fib-check rule is the default in firewalld-based distros, and the `nf_hooks_lwtunnel` gate can even be flipped host-wide by any local unprivileged user via a user namespace.\nPR:N - Packet processing happens before any authentication or authorization; the attacker needs no credentials or privileges on the target at all, only the ability to send a packet to the SID.\nUI:N - The crash occurs entirely in the kernel\u0027s packet receive path with no action by any local user or administrator beyond the pre-existing configuration.\nS:U - The NULL dereference occurs in the kernel of the machine receiving the packet, and the impact is confined to that same kernel/security authority \u2014 no VM, IOMMU, or sandbox boundary is crossed.\nC:N - The fault is a read of a fixed small offset (0x90) from a NULL pointer, which is unmapped; nothing is returned to the attacker and no kernel memory contents are exposed.\nI:N - No memory is written and no data is modified \u2014 the bug is a read-only dereference of a NULL device pointer, which cannot be leveraged into a write or control-flow primitive.\nA:H - The NULL dereference happens in softirq/interrupt context during NAPI receive processing, producing a kernel oops that panics or renders the router unusable, and it can be re-triggered by every subsequent packet."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:34:16.301Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/af90e3d73dc45778767b2fb6e7edd57ebe34380d"
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        },
        {
          "url": "https://git.kernel.org/stable/c/561475d53aa7e4511ee7cdba8728ded81cf1db1c"
        },
        {
          "url": "https://git.kernel.org/stable/c/9a3bc8d16e0aacd65c31aaf23a2bced3288a7779"
        }
      ],
      "title": "seg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-40957",
    "datePublished": "2024-07-12T12:31:59.747Z",
    "dateReserved": "2024-07-12T12:17:45.593Z",
    "dateUpdated": "2026-08-05T11:34:16.301Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.