Vulnerability-Lookup

GHSA-VFVP-R4J5-4Q92

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: caif: clear client service pointer on teardown

caif_connect() can tear down an existing client after remote shutdown by calling caif_disconnect_client() followed by caif_free_client(). caif_free_client() releases the service layer referenced by adap_layer->dn, but leaves that pointer stale.

When the socket is later destroyed, caif_sock_destructor() calls caif_free_client() again and dereferences the freed service pointer.

Clear the client/service links before releasing the service object so repeated teardown becomes harmless.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46098"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:31Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: caif: clear client service pointer on teardown\n\n`caif_connect()` can tear down an existing client after remote shutdown by\ncalling `caif_disconnect_client()` followed by `caif_free_client()`.\n`caif_free_client()` releases the service layer referenced by\n`adap_layer-\u003edn`, but leaves that pointer stale.\n\nWhen the socket is later destroyed, `caif_sock_destructor()` calls\n`caif_free_client()` again and dereferences the freed service pointer.\n\nClear the client/service links before releasing the service object so\nrepeated teardown becomes harmless.",
  "id": "GHSA-vfvp-r4j5-4q92",
  "modified": "2026-05-27T15:33:24Z",
  "published": "2026-05-27T15:33:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46098"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ac6db584d9d420267bb8413115707eeec76d9cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/63d21a3aa0108b9dde4e99b0d3d5d679ac68c0f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/914c6456fcfc21a3d553945dff62fd1621d6155d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a4b191ddc12c55ddb62feb096536f819f384d6f1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f7cf8ece8cee3c1ee361991470cdb1eb65ab02e8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-46098 (GCVE-0-2026-46098)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:59 – Updated: 2026-05-27 12:59

Title

net: caif: clear client service pointer on teardown

Summary

In the Linux kernel, the following vulnerability has been resolved: net: caif: clear client service pointer on teardown `caif_connect()` can tear down an existing client after remote shutdown by calling `caif_disconnect_client()` followed by `caif_free_client()`. `caif_free_client()` releases the service layer referenced by `adap_layer->dn`, but leaves that pointer stale. When the socket is later destroyed, `caif_sock_destructor()` calls `caif_free_client()` again and dereferences the freed service pointer. Clear the client/service links before releasing the service object so repeated teardown becomes harmless.

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/914c6456fcfc21a3d…
https://git.kernel.org/stable/c/3ac6db584d9d42026…
https://git.kernel.org/stable/c/63d21a3aa0108b9dd…
https://git.kernel.org/stable/c/a4b191ddc12c55ddb…
https://git.kernel.org/stable/c/f7cf8ece8cee3c1ee…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 43e3692101086add8719c3b8b50b05c9ac5b14e1 , < 914c6456fcfc21a3d553945dff62fd1621d6155d (git) Affected: 43e3692101086add8719c3b8b50b05c9ac5b14e1 , < 3ac6db584d9d420267bb8413115707eeec76d9cf (git) Affected: 43e3692101086add8719c3b8b50b05c9ac5b14e1 , < 63d21a3aa0108b9dde4e99b0d3d5d679ac68c0f9 (git) Affected: 43e3692101086add8719c3b8b50b05c9ac5b14e1 , < a4b191ddc12c55ddb62feb096536f819f384d6f1 (git) Affected: 43e3692101086add8719c3b8b50b05c9ac5b14e1 , < f7cf8ece8cee3c1ee361991470cdb1eb65ab02e8 (git)
Linux	Linux	Affected: 3.0 Unaffected: 0 , < 3.0 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.86 , ≤ 6.12.* (semver) Unaffected: 6.18.27 , ≤ 6.18.* (semver) Unaffected: 7.0.4 , ≤ 7.0.* (semver) Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/caif/cfsrvl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "3ac6db584d9d420267bb8413115707eeec76d9cf",
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "43e3692101086add8719c3b8b50b05c9ac5b14e1",
              "versionType": "git"
            },
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              "versionType": "git"
            },
            {
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              "version": "43e3692101086add8719c3b8b50b05c9ac5b14e1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/caif/cfsrvl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "3.0"
            },
            {
              "lessThan": "3.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.27",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: caif: clear client service pointer on teardown\n\n`caif_connect()` can tear down an existing client after remote shutdown by\ncalling `caif_disconnect_client()` followed by `caif_free_client()`.\n`caif_free_client()` releases the service layer referenced by\n`adap_layer-\u003edn`, but leaves that pointer stale.\n\nWhen the socket is later destroyed, `caif_sock_destructor()` calls\n`caif_free_client()` again and dereferences the freed service pointer.\n\nClear the client/service links before releasing the service object so\nrepeated teardown becomes harmless."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:59:02.308Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/914c6456fcfc21a3d553945dff62fd1621d6155d"
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        },
        {
          "url": "https://git.kernel.org/stable/c/f7cf8ece8cee3c1ee361991470cdb1eb65ab02e8"
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      "title": "net: caif: clear client service pointer on teardown",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46098",
    "datePublished": "2026-05-27T12:59:02.308Z",
    "dateReserved": "2026-05-13T15:03:33.097Z",
    "dateUpdated": "2026-05-27T12:59:02.308Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-VFVP-R4J5-4Q92

CVE-2026-46098 (GCVE-0-2026-46098)

Tags

Sightings

Nomenclature