Vulnerability-Lookup

GHSA-3538-RRCV-8MRQ

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33

Details

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

net: remove WARN_ON_ONCE when accessing forward path array

Although unlikely, recent support for IPIP tunnels increases chances of reaching this WARN_ON_ONCE if userspace manages to build a sufficiently long forward path.

Remove it.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-45847"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:16:56Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: remove WARN_ON_ONCE when accessing forward path array\n\nAlthough unlikely, recent support for IPIP tunnels increases chances of\nreaching this WARN_ON_ONCE if userspace manages to build a sufficiently\nlong forward path.\n\nRemove it.",
  "id": "GHSA-3538-rrcv-8mrq",
  "modified": "2026-05-27T15:33:12Z",
  "published": "2026-05-27T15:33:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45847"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/008e7a7c293b30bc43e4368dac6ea3808b75a572"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50422613185d505201167e8bdd2f2700790d5db6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/548244c2f542aa0ad49453e9306e715a3877bc44"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9464ca7a6e56ad1ebf48b2ad5c16871edfad10c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/959ea349c7e2d4edf07b6838ca7e59345fe61a08"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a78d055ba7c31103ad02f8eceb0c452e154d2660"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dcf9b3c90e5560339649d088836529883fb509f3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-45847 (GCVE-0-2026-45847)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:15 – Updated: 2026-05-27 12:15

Title

net: remove WARN_ON_ONCE when accessing forward path array

Summary

In the Linux kernel, the following vulnerability has been resolved: net: remove WARN_ON_ONCE when accessing forward path array Although unlikely, recent support for IPIP tunnels increases chances of reaching this WARN_ON_ONCE if userspace manages to build a sufficiently long forward path. Remove it.

Severity

No CVSS data available.

Assigner

Linux

References

7 references

URL	Tags
https://git.kernel.org/stable/c/548244c2f542aa0ad…
https://git.kernel.org/stable/c/dcf9b3c90e5560339…
https://git.kernel.org/stable/c/9464ca7a6e56ad1eb…
https://git.kernel.org/stable/c/959ea349c7e2d4edf…
https://git.kernel.org/stable/c/50422613185d50520…
https://git.kernel.org/stable/c/a78d055ba7c31103a…
https://git.kernel.org/stable/c/008e7a7c293b30bc4…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ddb94eafab8b597b05904c8277194ea2d6357fa9 , < 548244c2f542aa0ad49453e9306e715a3877bc44 (git) Affected: ddb94eafab8b597b05904c8277194ea2d6357fa9 , < dcf9b3c90e5560339649d088836529883fb509f3 (git) Affected: ddb94eafab8b597b05904c8277194ea2d6357fa9 , < 9464ca7a6e56ad1ebf48b2ad5c16871edfad10c6 (git) Affected: ddb94eafab8b597b05904c8277194ea2d6357fa9 , < 959ea349c7e2d4edf07b6838ca7e59345fe61a08 (git) Affected: ddb94eafab8b597b05904c8277194ea2d6357fa9 , < 50422613185d505201167e8bdd2f2700790d5db6 (git) Affected: ddb94eafab8b597b05904c8277194ea2d6357fa9 , < a78d055ba7c31103ad02f8eceb0c452e154d2660 (git) Affected: ddb94eafab8b597b05904c8277194ea2d6357fa9 , < 008e7a7c293b30bc43e4368dac6ea3808b75a572 (git)
Linux	Linux	Affected: 5.13 Unaffected: 0 , < 5.13 (semver) Unaffected: 5.15.202 , ≤ 5.15.* (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.14 , ≤ 6.18.* (semver) Unaffected: 6.19.4 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/dev.c"
          ],
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          "vendor": "Linux",
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
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          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.202",
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                },
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                },
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                },
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: remove WARN_ON_ONCE when accessing forward path array\n\nAlthough unlikely, recent support for IPIP tunnels increases chances of\nreaching this WARN_ON_ONCE if userspace manages to build a sufficiently\nlong forward path.\n\nRemove it."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:15:07.344Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/548244c2f542aa0ad49453e9306e715a3877bc44"
        },
        {
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        },
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          "url": "https://git.kernel.org/stable/c/9464ca7a6e56ad1ebf48b2ad5c16871edfad10c6"
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        },
        {
          "url": "https://git.kernel.org/stable/c/008e7a7c293b30bc43e4368dac6ea3808b75a572"
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      "title": "net: remove WARN_ON_ONCE when accessing forward path array",
      "x_generator": {
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  "cveMetadata": {
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    "cveId": "CVE-2026-45847",
    "datePublished": "2026-05-27T12:15:07.344Z",
    "dateReserved": "2026-05-13T15:03:33.078Z",
    "dateUpdated": "2026-05-27T12:15:07.344Z",
    "state": "PUBLISHED"
  },
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}

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.

Action not permitted

GHSA-3538-RRCV-8MRQ

CVE-2026-45847 (GCVE-0-2026-45847)

Tags

Sightings

Nomenclature