FKIE_CVE-2024-26950

Vulnerability from fkie_nvd - Published: 2024-05-01 06:15 - Updated: 2026-10-15 01:17
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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: wireguard: netlink: access device through ctx instead of peer The previous commit fixed a bug that led to a NULL peer->device being dereferenced. It's actually easier and faster performance-wise to instead get the device from ctx->wg. This semantically makes more sense too, since ctx->wg->peer_allowedips.seq is compared with ctx->allowedips_seq, basing them both in ctx. This also acts as a defence in depth provision against freed peers.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/09c3fa70f65175861ca948cb2f0f791e666c90e5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/493aa6bdcffd90a4f82aa614fe4f4db0641b4068Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4be453271a882c8ebc28df3dbf9e4d95e6ac42f5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/71cbd32e3db82ea4a74e3ef9aeeaa6971969c86fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/93bcc1752c69bb309f4d8cfaf960ef1faeb34996Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c991567e6c638079304cc15dff28748e4a3c4a37Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d44bd323d8bb8031eef4bdc44547925998a11e47Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/09c3fa70f65175861ca948cb2f0f791e666c90e5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/493aa6bdcffd90a4f82aa614fe4f4db0641b4068Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4be453271a882c8ebc28df3dbf9e4d95e6ac42f5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/71cbd32e3db82ea4a74e3ef9aeeaa6971969c86fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/93bcc1752c69bb309f4d8cfaf960ef1faeb34996Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c991567e6c638079304cc15dff28748e4a3c4a37Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d44bd323d8bb8031eef4bdc44547925998a11e47Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlMailing List, Third Party Advisory
0b142b55-0307-4c5a-b3c9-f314f3fb7c5ehttps://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
To clipboard 

{
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          "product": "Linux",
          "programFiles": [
            "drivers/net/wireguard/netlink.c"
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          ],
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          "vendor": "Linux",
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
          "vendor": "Siemens",
          "versions": [
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              "status": "affected",
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            }
          ]
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  "configurations": [
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwireguard: netlink: access device through ctx instead of peer\n\nThe previous commit fixed a bug that led to a NULL peer-\u003edevice being\ndereferenced. It\u0027s actually easier and faster performance-wise to\ninstead get the device from ctx-\u003ewg. This semantically makes more sense\ntoo, since ctx-\u003ewg-\u003epeer_allowedips.seq is compared with\nctx-\u003eallowedips_seq, basing them both in ctx. This also acts as a\ndefence in depth provision against freed peers."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: wireguard: netlink: acceda al dispositivo a trav\u00e9s de ctx en lugar de peer. el commit anterior solucion\u00f3 un error que provocaba que se desreferenciara un dispositivo NULL peer-\u0026gt;. En realidad, es m\u00e1s f\u00e1cil y r\u00e1pido en cuanto a rendimiento obtener el dispositivo desde ctx-\u0026gt;wg. Esto tambi\u00e9n tiene m\u00e1s sentido sem\u00e1nticamente, ya que ctx-\u0026gt;wg-\u0026gt;peer_allowedips.seq se compara con ctx-\u0026gt;allowedips_seq, bas\u00e1ndose ambos en ctx. Esto tambi\u00e9n act\u00faa como una defensa en profundidad contra los pares liberados."
    }
  ],
  "id": "CVE-2024-26950",
  "lastModified": "2026-10-15T01:17:33.187",
  "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"
        },
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        "type": "Secondary"
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          "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",
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        "ssvcData": {
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          "options": [
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            {
              "automatable": "no"
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            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-06-06T18:55:56.220490Z",
          "version": "2.0.3"
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  "published": "2024-05-01T06:15:11.080",
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    },
    {
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      "tags": [
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        "Third Party Advisory"
      ],
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    },
    {
      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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