Vulnerability-Lookup

GHSA-V7QX-38VP-6JX8

Vulnerability from github – Published: 2026-02-04 18:30 – Updated: 2026-02-06 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

fou: Don't allow 0 for FOU_ATTR_IPPROTO.

fou_udp_recv() has the same problem mentioned in the previous patch.

If FOU_ATTR_IPPROTO is set to 0, skb is not freed by fou_udp_recv() nor "resubmit"-ted in ip_protocol_deliver_rcu().

Let's forbid 0 for FOU_ATTR_IPPROTO.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23083"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-04T17:16:19Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfou: Don\u0027t allow 0 for FOU_ATTR_IPPROTO.\n\nfou_udp_recv() has the same problem mentioned in the previous\npatch.\n\nIf FOU_ATTR_IPPROTO is set to 0, skb is not freed by\nfou_udp_recv() nor \"resubmit\"-ted in ip_protocol_deliver_rcu().\n\nLet\u0027s forbid 0 for FOU_ATTR_IPPROTO.",
  "id": "GHSA-v7qx-38vp-6jx8",
  "modified": "2026-02-06T18:30:30Z",
  "published": "2026-02-04T18:30:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23083"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1cc98b8887cabb1808d2f4a37cd10a7be7574771"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/611ef4bd9c73d9e6d87bed57a635ff1fdd8c91ea"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6e983789b7588ee59cbf303583546c043bad8e19"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7a9bc9e3f42391e4c187e099263cf7a1c4b69ff5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b75dff8446ec871030d8daf5a69e74f5fe8b956"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b7db31a52c3862a1a32202a273a4c32e7f5f4823"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7498f9bc390479ccfad7c7f2332237ff4945b03"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-23083 (GCVE-0-2026-23083)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:08 – Updated: 2026-02-09 08:38

Title

fou: Don't allow 0 for FOU_ATTR_IPPROTO.

Summary

In the Linux kernel, the following vulnerability has been resolved: fou: Don't allow 0 for FOU_ATTR_IPPROTO. fou_udp_recv() has the same problem mentioned in the previous patch. If FOU_ATTR_IPPROTO is set to 0, skb is not freed by fou_udp_recv() nor "resubmit"-ted in ip_protocol_deliver_rcu(). Let's forbid 0 for FOU_ATTR_IPPROTO.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/c7498f9bc390479cc…
	https://git.kernel.org/stable/c/611ef4bd9c73d9e6d…
	https://git.kernel.org/stable/c/6e983789b7588ee59…
	https://git.kernel.org/stable/c/1cc98b8887cabb180…
	https://git.kernel.org/stable/c/b7db31a52c3862a1a…
	https://git.kernel.org/stable/c/9b75dff8446ec8710…
	https://git.kernel.org/stable/c/7a9bc9e3f42391e4c…

Impacted products

Vendor

Product

Version

Linux

Affected: 23461551c00628c3f3fe9cf837bf53cf8f212b63 , < c7498f9bc390479ccfad7c7f2332237ff4945b03 (git)
Affected: 23461551c00628c3f3fe9cf837bf53cf8f212b63 , < 611ef4bd9c73d9e6d87bed57a635ff1fdd8c91ea (git)
Affected: 23461551c00628c3f3fe9cf837bf53cf8f212b63 , < 6e983789b7588ee59cbf303583546c043bad8e19 (git)
Affected: 23461551c00628c3f3fe9cf837bf53cf8f212b63 , < 1cc98b8887cabb1808d2f4a37cd10a7be7574771 (git)
Affected: 23461551c00628c3f3fe9cf837bf53cf8f212b63 , < b7db31a52c3862a1a32202a273a4c32e7f5f4823 (git)
Affected: 23461551c00628c3f3fe9cf837bf53cf8f212b63 , < 9b75dff8446ec871030d8daf5a69e74f5fe8b956 (git)
Affected: 23461551c00628c3f3fe9cf837bf53cf8f212b63 , < 7a9bc9e3f42391e4c187e099263cf7a1c4b69ff5 (git)

Linux

Affected: 3.18
Unaffected: 0 , < 3.18 (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)

Show details on NVD website

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{
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    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.18"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
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              "versionType": "semver"
            },
            {
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.162",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
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              "versionType": "semver"
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              "version": "6.12.68",
              "versionType": "semver"
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
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          "lang": "en",
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:38:23.034Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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      "title": "fou: Don\u0027t allow 0 for FOU_ATTR_IPPROTO.",
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    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-V7QX-38VP-6JX8

CVE-2026-23083 (GCVE-0-2026-23083)

Tags

Sightings

Nomenclature