github - ghsa-xrj4-4g3m-87pf

ghsa-xrj4-4g3m-87pf

Vulnerability from github

Published

2025-09-16 15:32

Modified

2025-09-16 15:32

Details

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

net: rose: convert 'use' field to refcount_t

The 'use' field in struct rose_neigh is used as a reference counter but lacks atomicity. This can lead to race conditions where a rose_neigh structure is freed while still being referenced by other code paths.

For example, when rose_neigh->use becomes zero during an ioctl operation via rose_rt_ioctl(), the structure may be removed while its timer is still active, potentially causing use-after-free issues.

This patch changes the type of 'use' from unsigned short to refcount_t and updates all code paths to use rose_neigh_hold() and rose_neigh_put() which operate reference counts atomically.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39826"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-16T13:16:02Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rose: convert \u0027use\u0027 field to refcount_t\n\nThe \u0027use\u0027 field in struct rose_neigh is used as a reference counter but\nlacks atomicity. This can lead to race conditions where a rose_neigh\nstructure is freed while still being referenced by other code paths.\n\nFor example, when rose_neigh-\u003euse becomes zero during an ioctl operation\nvia rose_rt_ioctl(), the structure may be removed while its timer is\nstill active, potentially causing use-after-free issues.\n\nThis patch changes the type of \u0027use\u0027 from unsigned short to refcount_t and\nupdates all code paths to use rose_neigh_hold() and rose_neigh_put() which\noperate reference counts atomically.",
  "id": "GHSA-xrj4-4g3m-87pf",
  "modified": "2025-09-16T15:32:35Z",
  "published": "2025-09-16T15:32:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39826"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0085b250fcc79f900c82a69980ec2f3e1871823b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/203e4f42596ede31498744018716a3db6dbb7f51"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d860d1faa6b2ce3becfdb8b0c2b048ad31800061"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f8c29fc437d03a98fb075c31c5be761cc8326284"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb07156cc0742ba4e93dfcc84280c011d05b301f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-39826 (GCVE-0-2025-39826)

Vulnerability from cvelistv5

Published

2025-09-16 13:00

Modified

2025-09-16 13:00

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: net: rose: convert 'use' field to refcount_t The 'use' field in struct rose_neigh is used as a reference counter but lacks atomicity. This can lead to race conditions where a rose_neigh structure is freed while still being referenced by other code paths. For example, when rose_neigh->use becomes zero during an ioctl operation via rose_rt_ioctl(), the structure may be removed while its timer is still active, potentially causing use-after-free issues. This patch changes the type of 'use' from unsigned short to refcount_t and updates all code paths to use rose_neigh_hold() and rose_neigh_put() which operate reference counts atomically.

References

▼	URL	Tags
	https://git.kernel.org/stable/c/fb07156cc0742ba4e93dfcc84280c011d05b301f
	https://git.kernel.org/stable/c/f8c29fc437d03a98fb075c31c5be761cc8326284
	https://git.kernel.org/stable/c/0085b250fcc79f900c82a69980ec2f3e1871823b
	https://git.kernel.org/stable/c/203e4f42596ede31498744018716a3db6dbb7f51
	https://git.kernel.org/stable/c/d860d1faa6b2ce3becfdb8b0c2b048ad31800061

Impacted products

Vendor

Product

Version

▼

Linux

Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Linux

Version: 2.6.12

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/rose.h",
            "net/rose/af_rose.c",
            "net/rose/rose_in.c",
            "net/rose/rose_route.c",
            "net/rose/rose_timer.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
            {
              "lessThan": "0085b250fcc79f900c82a69980ec2f3e1871823b",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "203e4f42596ede31498744018716a3db6dbb7f51",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "d860d1faa6b2ce3becfdb8b0c2b048ad31800061",
              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/net/rose.h",
            "net/rose/af_rose.c",
            "net/rose/rose_in.c",
            "net/rose/rose_route.c",
            "net/rose/rose_timer.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.150",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.150",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
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                  "vulnerable": true
                },
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                  "vulnerable": true
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rose: convert \u0027use\u0027 field to refcount_t\n\nThe \u0027use\u0027 field in struct rose_neigh is used as a reference counter but\nlacks atomicity. This can lead to race conditions where a rose_neigh\nstructure is freed while still being referenced by other code paths.\n\nFor example, when rose_neigh-\u003euse becomes zero during an ioctl operation\nvia rose_rt_ioctl(), the structure may be removed while its timer is\nstill active, potentially causing use-after-free issues.\n\nThis patch changes the type of \u0027use\u0027 from unsigned short to refcount_t and\nupdates all code paths to use rose_neigh_hold() and rose_neigh_put() which\noperate reference counts atomically."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-16T13:00:24.618Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/fb07156cc0742ba4e93dfcc84280c011d05b301f"
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        },
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          "url": "https://git.kernel.org/stable/c/203e4f42596ede31498744018716a3db6dbb7f51"
        },
        {
          "url": "https://git.kernel.org/stable/c/d860d1faa6b2ce3becfdb8b0c2b048ad31800061"
        }
      ],
      "title": "net: rose: convert \u0027use\u0027 field to refcount_t",
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        "engine": "bippy-1.2.0"
      }
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39826",
    "datePublished": "2025-09-16T13:00:24.618Z",
    "dateReserved": "2025-04-16T07:20:57.140Z",
    "dateUpdated": "2025-09-16T13:00:24.618Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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