Vulnerability-Lookup

GHSA-HXPR-87WQ-JWF8

Vulnerability from github – Published: 2023-09-06 15:30 – Updated: 2026-09-17 21:31

Details

A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation.

The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free.

We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2023-4622"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-09-06T14:15:12Z",
    "severity": "HIGH"
  },
  "details": "A use-after-free vulnerability in the Linux kernel\u0027s af_unix component can be exploited to achieve local privilege escalation.\n\nThe unix_stream_sendpage() function tries to add data to the last skb in the peer\u0027s recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free.\n\nWe recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c.",
  "id": "GHSA-hxpr-87wq-jwf8",
  "modified": "2026-09-17T21:31:14Z",
  "published": "2023-09-06T15:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4622"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.1.y\u0026id=790c2f9d15b594350ae9bca7b236f2b1859de02c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4821df2ffe38d629170edc266e65fa05970e0745"
    },
    {
      "type": "WEB",
      "url": "https://kernel.dance/790c2f9d15b594350ae9bca7b236f2b1859de02c"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2023/dsa-5492"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2023-4622 (GCVE-0-2023-4622)

Vulnerability from cvelistv5 – Published: 2023-09-06 13:56 – Updated: 2026-09-17 19:26

Title

Use-after-free in Linux kernel's af_unix component

Summary

A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation. The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free. We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c (or backported equivalents).

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416 - Use After Free

Assigner

Google CNA under the Google root

CNA scorecard C 75/100 over 34 records in the last 180 days details

References

7 references

URL	Tags
https://git.kernel.org/pub/scm/linux/kernel/git/t…	patch
https://git.kernel.org/pub/scm/linux/kernel/git/s…	patch
https://kernel.dance/790c2f9d15b594350ae9bca7b236…
https://www.debian.org/security/2023/dsa-5492
https://lists.debian.org/debian-lts-announce/2023…
http://packetstormsecurity.com/files/175963/Kerne…
https://lists.debian.org/debian-lts-announce/2024…

Impacted products

1 product

Vendor	Product	Version
Linux	Kernel	Affected: 4.2 , < 4.14.324 (custom) Affected: 4.15 , < 4.19.293 (custom) Affected: 4.20 , < 5.4.255 (custom) Affected: 5.5 , < 5.10.192 (custom) Affected: 5.11 , < 5.15.128 (custom) Affected: 5.16 , < 6.1.47 (custom) Affected: 6.2 , < 6.4.12 (custom) Unaffected: 6.5 (custom)

Date Public

2023-08-23 15:52

Credits

Billy Jheng Bing-Jhong

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T07:31:06.586Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "patch",
              "x_transferred"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.1.y\u0026id=790c2f9d15b594350ae9bca7b236f2b1859de02c"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://kernel.dance/790c2f9d15b594350ae9bca7b236f2b1859de02c"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2023/dsa-5492"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageName": "kernel",
          "product": "Kernel",
          "repo": "https://git.kernel.org",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4.14.324",
              "status": "affected",
              "version": "4.2",
              "versionType": "custom"
            },
            {
              "lessThan": "4.19.293",
              "status": "affected",
              "version": "4.15",
              "versionType": "custom"
            },
            {
              "lessThan": "5.4.255",
              "status": "affected",
              "version": "4.20",
              "versionType": "custom"
            },
            {
              "lessThan": "5.10.192",
              "status": "affected",
              "version": "5.5",
              "versionType": "custom"
            },
            {
              "lessThan": "5.15.128",
              "status": "affected",
              "version": "5.11",
              "versionType": "custom"
            },
            {
              "lessThan": "6.1.47",
              "status": "affected",
              "version": "5.16",
              "versionType": "custom"
            },
            {
              "lessThan": "6.4.12",
              "status": "affected",
              "version": "6.2",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "6.5",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "user": "00000000-0000-4000-9000-000000000000",
          "value": "Billy Jheng Bing-Jhong"
        }
      ],
      "datePublic": "2023-08-23T15:52:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eA use-after-free vulnerability in the Linux kernel\u0027s af_unix component can be exploited to achieve local privilege escalation.\u003c/p\u003e\u003cp\u003eThe unix_stream_sendpage() function tries to add data to the last skb in the peer\u0027s recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free.\u003c/p\u003e\u003cp\u003eWe recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c (or backported equivalents).\u003c/p\u003e"
            }
          ],
          "value": "A use-after-free vulnerability in the Linux kernel\u0027s af_unix component can be exploited to achieve local privilege escalation.\n\n\n\nThe unix_stream_sendpage() function tries to add data to the last skb in the peer\u0027s recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free.\n\n\n\nWe recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c (or backported equivalents)."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-233",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-233 Privilege Escalation"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416 Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T19:26:48.877Z",
        "orgId": "14ed7db2-1595-443d-9d34-6215bf890778",
        "shortName": "Google"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4821df2ffe38d629170edc266e65fa05970e0745"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.1.y\u0026id=790c2f9d15b594350ae9bca7b236f2b1859de02c"
        },
        {
          "url": "https://kernel.dance/790c2f9d15b594350ae9bca7b236f2b1859de02c"
        },
        {
          "url": "https://www.debian.org/security/2023/dsa-5492"
        },
        {
          "url": "https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html"
        },
        {
          "url": "http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html"
        },
        {
          "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Use-after-free in Linux kernel\u0027s af_unix component",
      "x_generator": {
        "engine": "Vulnogram 0.1.0-dev"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778",
    "assignerShortName": "Google",
    "cveId": "CVE-2023-4622",
    "datePublished": "2023-09-06T13:56:56.355Z",
    "dateReserved": "2023-08-30T11:57:48.389Z",
    "dateUpdated": "2026-09-17T19:26:48.877Z",
    "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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GHSA-HXPR-87WQ-JWF8

CVE-2023-4622 (GCVE-0-2023-4622)

Tags

Sightings

Nomenclature

Related by attack behaviour