Vulnerability-Lookup

GHSA-C5XH-C73J-MCX2

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:

af_unix: Fix memleak of newsk in unix_stream_connect().

When prepare_peercred() fails in unix_stream_connect(), unix_release_sock() is not called for newsk, and the memory is leaked.

Let's move prepare_peercred() before unix_create1().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-45887"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:02Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Fix memleak of newsk in unix_stream_connect().\n\nWhen prepare_peercred() fails in unix_stream_connect(),\nunix_release_sock() is not called for newsk, and the memory\nis leaked.\n\nLet\u0027s move prepare_peercred() before unix_create1().",
  "id": "GHSA-c5xh-c73j-mcx2",
  "modified": "2026-05-27T15:33:14Z",
  "published": "2026-05-27T15:33:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45887"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/365996a2b14d07caa9e33d367b67ea26c09d89b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6884028cd7f275f8bcb854a347265cb1fb0e4bea"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a5d95d7caba0160fb7b2b8d2bd96d5a1be861d9f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-45887 (GCVE-0-2026-45887)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:16 – Updated: 2026-05-27 12:16

Title

af_unix: Fix memleak of newsk in unix_stream_connect().

Summary

In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix memleak of newsk in unix_stream_connect(). When prepare_peercred() fails in unix_stream_connect(), unix_release_sock() is not called for newsk, and the memory is leaked. Let's move prepare_peercred() before unix_create1().

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/365996a2b14d07caa…
https://git.kernel.org/stable/c/a5d95d7caba0160fb…
https://git.kernel.org/stable/c/6884028cd7f275f8b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: fd0a109a0f6b7524543d17520da92a44a9f5343c , < 365996a2b14d07caa9e33d367b67ea26c09d89b4 (git) Affected: fd0a109a0f6b7524543d17520da92a44a9f5343c , < a5d95d7caba0160fb7b2b8d2bd96d5a1be861d9f (git) Affected: fd0a109a0f6b7524543d17520da92a44a9f5343c , < 6884028cd7f275f8bcb854a347265cb1fb0e4bea (git)
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (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/unix/af_unix.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "365996a2b14d07caa9e33d367b67ea26c09d89b4",
              "status": "affected",
              "version": "fd0a109a0f6b7524543d17520da92a44a9f5343c",
              "versionType": "git"
            },
            {
              "lessThan": "a5d95d7caba0160fb7b2b8d2bd96d5a1be861d9f",
              "status": "affected",
              "version": "fd0a109a0f6b7524543d17520da92a44a9f5343c",
              "versionType": "git"
            },
            {
              "lessThan": "6884028cd7f275f8bcb854a347265cb1fb0e4bea",
              "status": "affected",
              "version": "fd0a109a0f6b7524543d17520da92a44a9f5343c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/unix/af_unix.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "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": "6.18.14",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.4",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Fix memleak of newsk in unix_stream_connect().\n\nWhen prepare_peercred() fails in unix_stream_connect(),\nunix_release_sock() is not called for newsk, and the memory\nis leaked.\n\nLet\u0027s move prepare_peercred() before unix_create1()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:16:58.720Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/365996a2b14d07caa9e33d367b67ea26c09d89b4"
        },
        {
          "url": "https://git.kernel.org/stable/c/a5d95d7caba0160fb7b2b8d2bd96d5a1be861d9f"
        },
        {
          "url": "https://git.kernel.org/stable/c/6884028cd7f275f8bcb854a347265cb1fb0e4bea"
        }
      ],
      "title": "af_unix: Fix memleak of newsk in unix_stream_connect().",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45887",
    "datePublished": "2026-05-27T12:16:58.720Z",
    "dateReserved": "2026-05-13T15:03:33.082Z",
    "dateUpdated": "2026-05-27T12:16:58.720Z",
    "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-C5XH-C73J-MCX2

CVE-2026-45887 (GCVE-0-2026-45887)

Tags

Sightings

Nomenclature