Vulnerability-Lookup

FKIE_CVE-2024-26951

Vulnerability from fkie_nvd - Published: 2024-05-01 06:15 - Updated: 2026-08-04 11:17

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: wireguard: netlink: check for dangling peer via is_dead instead of empty list If all peers are removed via wg_peer_remove_all(), rather than setting peer_list to empty, the peer is added to a temporary list with a head on the stack of wg_peer_remove_all(). If a netlink dump is resumed and the cursored peer is one that has been removed via wg_peer_remove_all(), it will iterate from that peer and then attempt to dump freed peers. Fix this by instead checking peer->is_dead, which was explictly created for this purpose. Also move up the device_update_lock lockdep assertion, since reading is_dead relies on that. It can be reproduced by a small script like: echo "Setting config..." ip link add dev wg0 type wireguard wg setconf wg0 /big-config ( while true; do echo "Showing config..." wg showconf wg0 > /dev/null done ) & sleep 4 wg setconf wg0 <(printf "[Peer]\nPublicKey=$(wg genkey)\n") Resulting in: BUG: KASAN: slab-use-after-free in __lock_acquire+0x182a/0x1b20 Read of size 8 at addr ffff88811956ec70 by task wg/59 CPU: 2 PID: 59 Comm: wg Not tainted 6.8.0-rc2-debug+ #5 Call Trace: <TASK> dump_stack_lvl+0x47/0x70 print_address_description.constprop.0+0x2c/0x380 print_report+0xab/0x250 kasan_report+0xba/0xf0 __lock_acquire+0x182a/0x1b20 lock_acquire+0x191/0x4b0 down_read+0x80/0x440 get_peer+0x140/0xcb0 wg_get_device_dump+0x471/0x1130

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/13d107794304306164481d31ce33f8fdb25a9c04	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/302b2dfc013baca3dea7ceda383930d9297d231d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/55b6c738673871c9b0edae05d0c97995c1ff08c4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/710a177f347282eea162aec8712beb1f42d5ad87	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7bedfe4cfa38771840a355970e4437cd52d4046b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b7cea3a9af0853fdbb1b16633a458f991dde6aac	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f52be46e3e6ecefc2539119784324f0cbc09620a	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/13d107794304306164481d31ce33f8fdb25a9c04	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/302b2dfc013baca3dea7ceda383930d9297d231d	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/55b6c738673871c9b0edae05d0c97995c1ff08c4	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/710a177f347282eea162aec8712beb1f42d5ad87	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/7bedfe4cfa38771840a355970e4437cd52d4046b	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/b7cea3a9af0853fdbb1b16633a458f991dde6aac	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/f52be46e3e6ecefc2539119784324f0cbc09620a	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html	Third Party Advisory
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	https://cert-portal.siemens.com/productcert/html/ssa-265688.html

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
debian	debian_linux	10.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireguard/netlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireguard/netlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.215",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.84",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "*",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
    }
  ],
  "configurations": [
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            },
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              "versionEndExcluding": "6.1.84",
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              "vulnerable": true
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8018C1D0-0A5F-48D0-BC72-A2B33FDDA693",
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwireguard: netlink: check for dangling peer via is_dead instead of empty list\n\nIf all peers are removed via wg_peer_remove_all(), rather than setting\npeer_list to empty, the peer is added to a temporary list with a head on\nthe stack of wg_peer_remove_all(). If a netlink dump is resumed and the\ncursored peer is one that has been removed via wg_peer_remove_all(), it\nwill iterate from that peer and then attempt to dump freed peers.\n\nFix this by instead checking peer-\u003eis_dead, which was explictly created\nfor this purpose. Also move up the device_update_lock lockdep assertion,\nsince reading is_dead relies on that.\n\nIt can be reproduced by a small script like:\n\n    echo \"Setting config...\"\n    ip link add dev wg0 type wireguard\n    wg setconf wg0 /big-config\n    (\n            while true; do\n                    echo \"Showing config...\"\n                    wg showconf wg0 \u003e /dev/null\n            done\n    ) \u0026\n    sleep 4\n    wg setconf wg0 \u003c(printf \"[Peer]\\nPublicKey=$(wg genkey)\\n\")\n\nResulting in:\n\n    BUG: KASAN: slab-use-after-free in __lock_acquire+0x182a/0x1b20\n    Read of size 8 at addr ffff88811956ec70 by task wg/59\n    CPU: 2 PID: 59 Comm: wg Not tainted 6.8.0-rc2-debug+ #5\n    Call Trace:\n     \u003cTASK\u003e\n     dump_stack_lvl+0x47/0x70\n     print_address_description.constprop.0+0x2c/0x380\n     print_report+0xab/0x250\n     kasan_report+0xba/0xf0\n     __lock_acquire+0x182a/0x1b20\n     lock_acquire+0x191/0x4b0\n     down_read+0x80/0x440\n     get_peer+0x140/0xcb0\n     wg_get_device_dump+0x471/0x1130"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wireguard: netlink: verifique si hay pares pendientes a trav\u00e9s de is_dead en lugar de una lista vac\u00eda. Si todos los pares se eliminan a trav\u00e9s de wg_peer_remove_all(), en lugar de configurar peer_list como vac\u00edo, el par se agrega a una lista temporal. lista con un encabezado en la pila de wg_peer_remove_all(). Si se reanuda un volcado de netlink y el par seleccionado es uno que se elimin\u00f3 mediante wg_peer_remove_all(), iterar\u00e1 desde ese par y luego intentar\u00e1 volcar los pares liberados. Para solucionar este problema, marque peer-\u0026gt;is_dead, que se cre\u00f3 expl\u00edcitamente para este prop\u00f3sito. Tambi\u00e9n suba la aserci\u00f3n de bloqueo de dispositivo_update_lock, ya que la lectura is_dead depende de eso. Se puede reproducir mediante un peque\u00f1o script como: echo \"Configuraci\u00f3n de configuraci\u00f3n...\" ip link add dev wg0 tipo wireguard wg setconf wg0 /big-config (mientras sea verdadero; haga echo \"Mostrando configuraci\u00f3n...\" wg showconf wg0 \u0026gt; / dev/null done) \u0026amp; sleep 4 wg setconf wg0 \u0026lt;(printf \"[Peer]\\nPublicKey=$(wg genkey)\\n\") Resultando en: ERROR: KASAN: slab-use-after-free en __lock_acquire+0x182a/0x1b20 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff88811956ec70 mediante la tarea wg/59 CPU: 2 PID: 59 Comm: wg Not tainted 6.8.0-rc2-debug+ #5 Seguimiento de llamadas:  dump_stack_lvl+0x47/0x70 print_address_description.constprop.0+0x2c /0x380 print_report+0xab/0x250 kasan_report+0xba/0xf0 __lock_acquire+0x182a/0x1b20 lock_acquire+0x191/0x4b0 down_read+0x80/0x440 get_peer+0x140/0xcb0 wg_get_device_dump+0x471/0x1130"
    }
  ],
  "id": "CVE-2024-26951",
  "lastModified": "2026-08-04T11:17:25.113",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-26951",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T15:45:36.397018Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-05-01T06:15:11.223",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      ],
      "url": "https://git.kernel.org/stable/c/13d107794304306164481d31ce33f8fdb25a9c04"
    },
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      "tags": [
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      "url": "https://git.kernel.org/stable/c/302b2dfc013baca3dea7ceda383930d9297d231d"
    },
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    },
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    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      "tags": [
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      "url": "https://git.kernel.org/stable/c/b7cea3a9af0853fdbb1b16633a458f991dde6aac"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/f52be46e3e6ecefc2539119784324f0cbc09620a"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
    },
    {
      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2024-26951 (GCVE-0-2024-26951)

Vulnerability from cvelistv5 – Published: 2024-05-01 05:18 – Updated: 2026-08-05 11:28

Title

wireguard: netlink: check for dangling peer via is_dead instead of empty list

Summary

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 15:45 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6665 records in the last 180 days details

References

9 references

URL	Tags
https://git.kernel.org/stable/c/f52be46e3e6ecefc2…
https://git.kernel.org/stable/c/710a177f347282eea…
https://git.kernel.org/stable/c/b7cea3a9af0853fdb…
https://git.kernel.org/stable/c/13d10779430430616…
https://git.kernel.org/stable/c/7bedfe4cfa3877184…
https://git.kernel.org/stable/c/302b2dfc013baca3d…
https://git.kernel.org/stable/c/55b6c738673871c9b…
https://lists.debian.org/debian-lts-announce/2024…	x_transferred
https://cert-portal.siemens.com/productcert/html/…

Impacted products

3 products

Vendor	Product	Version
Linux	Linux	Affected: e7096c131e5161fa3b8e52a650d7719d2857adfd , < f52be46e3e6ecefc2539119784324f0cbc09620a (git) Affected: e7096c131e5161fa3b8e52a650d7719d2857adfd , < 710a177f347282eea162aec8712beb1f42d5ad87 (git) Affected: e7096c131e5161fa3b8e52a650d7719d2857adfd , < b7cea3a9af0853fdbb1b16633a458f991dde6aac (git) Affected: e7096c131e5161fa3b8e52a650d7719d2857adfd , < 13d107794304306164481d31ce33f8fdb25a9c04 (git) Affected: e7096c131e5161fa3b8e52a650d7719d2857adfd , < 7bedfe4cfa38771840a355970e4437cd52d4046b (git) Affected: e7096c131e5161fa3b8e52a650d7719d2857adfd , < 302b2dfc013baca3dea7ceda383930d9297d231d (git) Affected: e7096c131e5161fa3b8e52a650d7719d2857adfd , < 55b6c738673871c9b0edae05d0c97995c1ff08c4 (git)
Linux	Linux	Affected: 5.6 Unaffected: 0 , < 5.6 (semver) Unaffected: 5.10.215 , ≤ 5.10.* (semver) Unaffected: 5.15.154 , ≤ 5.15.* (semver) Unaffected: 6.1.84 , ≤ 6.1.* (semver) Unaffected: 6.6.24 , ≤ 6.6.* (semver) Unaffected: 6.7.12 , ≤ 6.7.* (semver) Unaffected: 6.8.3 , ≤ 6.8.* (semver) Unaffected: 6.9 , ≤ * (original_commit_for_fix)
Siemens	SIMATIC S7-1500 TM MFP - GNU/Linux subsystem	Affected: 0 , < * (custom)

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T00:21:05.788Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/f52be46e3e6ecefc2539119784324f0cbc09620a"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/710a177f347282eea162aec8712beb1f42d5ad87"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/b7cea3a9af0853fdbb1b16633a458f991dde6aac"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/13d107794304306164481d31ce33f8fdb25a9c04"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/7bedfe4cfa38771840a355970e4437cd52d4046b"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/302b2dfc013baca3dea7ceda383930d9297d231d"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/55b6c738673871c9b0edae05d0c97995c1ff08c4"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-26951",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:45:36.397018Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:32:58.386Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-12T11:50:47.613Z",
          "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
          "shortName": "siemens-SADP"
        },
        "references": [
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
          }
        ],
        "x_adpType": "supplier"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireguard/netlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f52be46e3e6ecefc2539119784324f0cbc09620a",
              "status": "affected",
              "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd",
              "versionType": "git"
            },
            {
              "lessThan": "710a177f347282eea162aec8712beb1f42d5ad87",
              "status": "affected",
              "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd",
              "versionType": "git"
            },
            {
              "lessThan": "b7cea3a9af0853fdbb1b16633a458f991dde6aac",
              "status": "affected",
              "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd",
              "versionType": "git"
            },
            {
              "lessThan": "13d107794304306164481d31ce33f8fdb25a9c04",
              "status": "affected",
              "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd",
              "versionType": "git"
            },
            {
              "lessThan": "7bedfe4cfa38771840a355970e4437cd52d4046b",
              "status": "affected",
              "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd",
              "versionType": "git"
            },
            {
              "lessThan": "302b2dfc013baca3dea7ceda383930d9297d231d",
              "status": "affected",
              "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd",
              "versionType": "git"
            },
            {
              "lessThan": "55b6c738673871c9b0edae05d0c97995c1ff08c4",
              "status": "affected",
              "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireguard/netlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.215",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.84",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.215",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.154",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.84",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.24",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7.12",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8.3",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.9",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwireguard: netlink: check for dangling peer via is_dead instead of empty list\n\nIf all peers are removed via wg_peer_remove_all(), rather than setting\npeer_list to empty, the peer is added to a temporary list with a head on\nthe stack of wg_peer_remove_all(). If a netlink dump is resumed and the\ncursored peer is one that has been removed via wg_peer_remove_all(), it\nwill iterate from that peer and then attempt to dump freed peers.\n\nFix this by instead checking peer-\u003eis_dead, which was explictly created\nfor this purpose. Also move up the device_update_lock lockdep assertion,\nsince reading is_dead relies on that.\n\nIt can be reproduced by a small script like:\n\n    echo \"Setting config...\"\n    ip link add dev wg0 type wireguard\n    wg setconf wg0 /big-config\n    (\n            while true; do\n                    echo \"Showing config...\"\n                    wg showconf wg0 \u003e /dev/null\n            done\n    ) \u0026\n    sleep 4\n    wg setconf wg0 \u003c(printf \"[Peer]\\nPublicKey=$(wg genkey)\\n\")\n\nResulting in:\n\n    BUG: KASAN: slab-use-after-free in __lock_acquire+0x182a/0x1b20\n    Read of size 8 at addr ffff88811956ec70 by task wg/59\n    CPU: 2 PID: 59 Comm: wg Not tainted 6.8.0-rc2-debug+ #5\n    Call Trace:\n     \u003cTASK\u003e\n     dump_stack_lvl+0x47/0x70\n     print_address_description.constprop.0+0x2c/0x380\n     print_report+0xab/0x250\n     kasan_report+0xba/0xf0\n     __lock_acquire+0x182a/0x1b20\n     lock_acquire+0x191/0x4b0\n     down_read+0x80/0x440\n     get_peer+0x140/0xcb0\n     wg_get_device_dump+0x471/0x1130"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is reached only through the WireGuard generic-netlink family (`WG_CMD_GET_DEVICE` dump raced against `WG_CMD_SET_DEVICE`), which requires a local netlink socket. Per kernel scoring guidance, netlink-reachable bugs are Local.\nAC:L - The attacker controls both sides of the race \u2014 one thread runs the resumable dump while another issues a peer-replace \u2014 and controls the peer count that forces multi-skb dump resumption, exactly as in the maintainer\u0027s shell-script reproducer. Nothing depends on conditions outside the attacker\u0027s influence.\nPR:L - The ops use `GENL_UNS_ADMIN_PERM`, i.e. `netlink_ns_capable(skb, net-\u003euser_ns, CAP_NET_ADMIN)`, and the family is `netnsok`, so an unprivileged user can obtain the needed capability via `unshare -Urn` \u2014 verified by successfully creating a WireGuard device in a user namespace as a normal user.\nUI:N - Exploitation is entirely driven by the attacker\u0027s own two threads issuing netlink requests on a device they created; no victim action or cooperation is involved.\nS:U - The use-after-free corrupts kernel heap state and leaks kernel memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - `get_peer()` reads freed `wg_peer` objects and `nla_put()`s their contents \u2014 public key, preshared key, endpoint, counters \u2014 directly into the netlink reply returned to userspace, and the traversal off a stale stack-resident list head can dereference wild pointers, giving a broad kernel-memory read primitive.\nI:H - `down_read()`/`read_lock_bh()` on the freed and wild-pointer objects perform atomic read-modify-write operations on attacker-groomable memory, which combined with heap spraying of the reclaimed `wg_peer` slab yields an exploitable write primitive for control-flow hijacking.\nA:H - The maintainer\u0027s reproducer produces a KASAN slab-use-after-free with a corrupted rwsem acquisition; unmitigated this reliably oopses or panics the kernel, and a garbage lock value can also hang the dumping task indefinitely."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:28:32.058Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f52be46e3e6ecefc2539119784324f0cbc09620a"
        },
        {
          "url": "https://git.kernel.org/stable/c/710a177f347282eea162aec8712beb1f42d5ad87"
        },
        {
          "url": "https://git.kernel.org/stable/c/b7cea3a9af0853fdbb1b16633a458f991dde6aac"
        },
        {
          "url": "https://git.kernel.org/stable/c/13d107794304306164481d31ce33f8fdb25a9c04"
        },
        {
          "url": "https://git.kernel.org/stable/c/7bedfe4cfa38771840a355970e4437cd52d4046b"
        },
        {
          "url": "https://git.kernel.org/stable/c/302b2dfc013baca3dea7ceda383930d9297d231d"
        },
        {
          "url": "https://git.kernel.org/stable/c/55b6c738673871c9b0edae05d0c97995c1ff08c4"
        }
      ],
      "title": "wireguard: netlink: check for dangling peer via is_dead instead of empty list",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26951",
    "datePublished": "2024-05-01T05:18:34.520Z",
    "dateReserved": "2024-02-19T14:20:24.198Z",
    "dateUpdated": "2026-08-05T11:28:32.058Z",
    "state": "PUBLISHED"
  },
  "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.

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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.
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