Vulnerability-Lookup

GHSA-6QXM-GR5M-J478

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:

netrom: fix double-free in nr_route_frame()

In nr_route_frame(), old_skb is immediately freed without checking if nr_neigh->ax25 pointer is NULL. Therefore, if nr_neigh->ax25 is NULL, the caller function will free old_skb again, causing a double-free bug.

Therefore, to prevent this, we need to modify it to check whether nr_neigh->ax25 is NULL before freeing old_skb.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23098"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-04T17:16:20Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetrom: fix double-free in nr_route_frame()\n\nIn nr_route_frame(), old_skb is immediately freed without checking if\nnr_neigh-\u003eax25 pointer is NULL. Therefore, if nr_neigh-\u003eax25 is NULL,\nthe caller function will free old_skb again, causing a double-free bug.\n\nTherefore, to prevent this, we need to modify it to check whether\nnr_neigh-\u003eax25 is NULL before freeing old_skb.",
  "id": "GHSA-6qxm-gr5m-j478",
  "modified": "2026-02-06T18:30:31Z",
  "published": "2026-02-04T18:30:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23098"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/25aab6bfc31017a7e52035b99aef5c2b6bde8ffb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6e0110ea90313b7c0558a0b77038274a6821caf8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c48fdf2d1349bb54815b56fb012b9d577707708"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94d1a8bd08af1f4cc345c5c29f5db1ea72b8bb8c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f5fa78d9980fe75a69835521627ab7943cb3d67"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ba1096c315283ee3292765f6aea4cca15816c4f7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd8955337e3764f912f49b360e176d8aaecf7016"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-23098 (GCVE-0-2026-23098)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:08 – Updated: 2026-02-06 16:33

Title

netrom: fix double-free in nr_route_frame()

Summary

In the Linux kernel, the following vulnerability has been resolved: netrom: fix double-free in nr_route_frame() In nr_route_frame(), old_skb is immediately freed without checking if nr_neigh->ax25 pointer is NULL. Therefore, if nr_neigh->ax25 is NULL, the caller function will free old_skb again, causing a double-free bug. Therefore, to prevent this, we need to modify it to check whether nr_neigh->ax25 is NULL before freeing old_skb.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/25aab6bfc31017a7e…
	https://git.kernel.org/stable/c/6e0110ea90313b7c0…
	https://git.kernel.org/stable/c/7c48fdf2d1349bb54…
	https://git.kernel.org/stable/c/bd8955337e3764f91…
	https://git.kernel.org/stable/c/94d1a8bd08af1f4cc…
	https://git.kernel.org/stable/c/9f5fa78d9980fe75a…
	https://git.kernel.org/stable/c/ba1096c315283ee32…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 25aab6bfc31017a7e52035b99aef5c2b6bde8ffb (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6e0110ea90313b7c0558a0b77038274a6821caf8 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7c48fdf2d1349bb54815b56fb012b9d577707708 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < bd8955337e3764f912f49b360e176d8aaecf7016 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 94d1a8bd08af1f4cc345c5c29f5db1ea72b8bb8c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9f5fa78d9980fe75a69835521627ab7943cb3d67 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ba1096c315283ee3292765f6aea4cca15816c4f7 (git)

Linux

Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (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-rc7 , ≤ * (original_commit_for_fix)

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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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              "lessThan": "7c48fdf2d1349bb54815b56fb012b9d577707708",
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              "status": "unaffected",
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.199",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.162",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.122",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.68",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc7",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.249",
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                },
                {
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                },
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                  "versionStartIncluding": "2.6.12",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetrom: fix double-free in nr_route_frame()\n\nIn nr_route_frame(), old_skb is immediately freed without checking if\nnr_neigh-\u003eax25 pointer is NULL. Therefore, if nr_neigh-\u003eax25 is NULL,\nthe caller function will free old_skb again, causing a double-free bug.\n\nTherefore, to prevent this, we need to modify it to check whether\nnr_neigh-\u003eax25 is NULL before freeing old_skb."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-06T16:33:20.693Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/6e0110ea90313b7c0558a0b77038274a6821caf8"
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        {
          "url": "https://git.kernel.org/stable/c/ba1096c315283ee3292765f6aea4cca15816c4f7"
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      "title": "netrom: fix double-free in nr_route_frame()",
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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-6QXM-GR5M-J478

CVE-2026-23098 (GCVE-0-2026-23098)

Tags

Sightings

Nomenclature