FKIE_CVE-2023-4622

Vulnerability from fkie_nvd - Published: 2023-09-06 14:15 - Updated: 2026-09-17 20:16
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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).
References
cve-coordination@google.comhttp://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.htmlThird Party Advisory
cve-coordination@google.comhttps://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.1.y&id=790c2f9d15b594350ae9bca7b236f2b1859de02cIssue Tracking, Mailing List, Patch, Vendor Advisory
cve-coordination@google.comhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4821df2ffe38d629170edc266e65fa05970e0745
cve-coordination@google.comhttps://kernel.dance/790c2f9d15b594350ae9bca7b236f2b1859de02cPatch, Vendor Advisory
cve-coordination@google.comhttps://lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlMailing List, Third Party Advisory
cve-coordination@google.comhttps://lists.debian.org/debian-lts-announce/2024/01/msg00004.htmlMailing List, Third Party Advisory
cve-coordination@google.comhttps://www.debian.org/security/2023/dsa-5492Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.1.y&id=790c2f9d15b594350ae9bca7b236f2b1859de02cIssue Tracking, Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://kernel.dance/790c2f9d15b594350ae9bca7b236f2b1859de02cPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/01/msg00004.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2023/dsa-5492Third Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
debian debian_linux 10.0
debian debian_linux 12.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "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"
            }
          ]
        }
      ],
      "source": "cve-coordination@google.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "93A7B59F-4DC9-4B55-AE8F-58F36A72BCB8",
              "versionEndExcluding": "4.14.324",
              "versionStartIncluding": "4.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "39603052-E341-4096-8535-38D44A60E845",
              "versionEndExcluding": "4.19.293",
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              "vulnerable": true
            },
            {
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              "versionEndExcluding": "5.4.255",
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              "vulnerable": true
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            {
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              "matchCriteriaId": "9396FFDC-6A0D-44B7-9368-21B456F6D4AE",
              "versionEndExcluding": "5.10.192",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1415629F-F97B-4880-BA1E-AF3DBB8EF305",
              "versionEndExcluding": "5.15.128",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2EEA01B0-0151-4E0F-B140-1A441EEDD717",
              "versionEndExcluding": "6.1.47",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "CF8ECF64-40AE-49AB-8315-4D83F9F56ECF",
              "versionEndExcluding": "6.4.12",
              "versionStartIncluding": "6.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "46D69DCC-AE4D-4EA5-861C-D60951444C6C",
              "vulnerable": true
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          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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)."
    },
    {
      "lang": "es",
      "value": "Se puede explotar una vulnerabilidad de use-after-free en el componente Linux kernel\u0027s af_unix para lograr una escalada de privilegios local. La funci\u00f3n  unix_stream_sendpage() intenta a\u00f1adir datos al \u00faltimo skb en la cola peer\u0027s recv sin bloquear la cola. Por lo tanto, existe una carrera donde unix_stream_sendpage() podr\u00eda acceder a un skb sin bloqueo que est\u00e1 siendo liberado mediante la recolecci\u00f3n de basura, resultando en use-after-free. Recomendamos actualizar despu\u00e9s del commit 790c2f9d15b594350ae9bca7b236f2b1859de02c."
    }
  ],
  "id": "CVE-2023-4622",
  "lastModified": "2026-09-17T20:16:47.693",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "cve-coordination@google.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.0,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2023-09-06T14:15:12.193",
  "references": [
    {
      "source": "cve-coordination@google.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html"
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      "source": "cve-coordination@google.com",
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    },
    {
      "source": "cve-coordination@google.com",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4821df2ffe38d629170edc266e65fa05970e0745"
    },
    {
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  "sourceIdentifier": "cve-coordination@google.com",
  "vulnStatus": "Modified",
  "weaknesses": [
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          "value": "CWE-416"
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      "source": "cve-coordination@google.com",
      "type": "Secondary"
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    {
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        {
          "lang": "en",
          "value": "CWE-416"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



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