CVE-2023-4622

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-4622", "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778", "state": "PUBLISHED", "assignerShortName": "Google", "dateReserved": "2023-08-30T11:57:48.389Z", "datePublished": "2023-09-06T13:56:56.355Z", "dateUpdated": "2026-09-17T19:26:48.877Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "14ed7db2-1595-443d-9d34-6215bf890778", "shortName": "Google", "dateUpdated": "2026-09-17T19:26:48.877Z"}, "title": "Use-after-free in Linux kernel's af_unix component", "datePublic": "2023-08-23T15:52:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-416", "description": "CWE-416 Use After Free", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-233", "descriptions": [{"lang": "en", "value": "CAPEC-233 Privilege Escalation"}]}], "affected": [{"vendor": "Linux", "product": "Kernel", "packageName": "kernel", "repo": "https://git.kernel.org", "versions": [{"status": "affected", "version": "4.2", "lessThan": "4.14.324", "versionType": "custom"}, {"status": "affected", "version": "4.15", "lessThan": "4.19.293", "versionType": "custom"}, {"status": "affected", "version": "4.20", "lessThan": "5.4.255", "versionType": "custom"}, {"status": "affected", "version": "5.5", "lessThan": "5.10.192", "versionType": "custom"}, {"status": "affected", "version": "5.11", "lessThan": "5.15.128", "versionType": "custom"}, {"status": "affected", "version": "5.16", "lessThan": "6.1.47", "versionType": "custom"}, {"status": "affected", "version": "6.2", "lessThan": "6.4.12", "versionType": "custom"}, {"status": "unaffected", "version": "6.5", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "A use-after-free vulnerability in the Linux kernel's 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'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.\n\n\n\nWe recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c (or backported equivalents).", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation.</p><p>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.</p><p>We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c (or backported equivalents).</p>"}]}], "references": [{"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&id=790c2f9d15b594350ae9bca7b236f2b1859de02c", "tags": ["patch"]}, {"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"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}}], "credits": [{"lang": "en", "value": "Billy Jheng Bing-Jhong", "user": "00000000-0000-4000-9000-000000000000", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 0.1.0-dev"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T07:31:06.586Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.1.y&id=790c2f9d15b594350ae9bca7b236f2b1859de02c", "tags": ["patch", "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", "tags": ["x_transferred"]}]}]}}

{}

{"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", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1379E40A-2AC3-484E-929A-7F46B6C3B521", "versionEndExcluding": "5.4.255", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "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": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73", "vulnerable": true}, {"criteria": "cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*", "matchCriteriaId": "46D69DCC-AE4D-4EA5-861C-D60951444C6C", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A use-after-free vulnerability in the Linux kernel's 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'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.\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's 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's 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"}, {"source": "cve-coordination@google.com", "tags": ["Issue Tracking", "Mailing List", "Patch", "Vendor Advisory"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.1.y&id=790c2f9d15b594350ae9bca7b236f2b1859de02c"}, {"source": "cve-coordination@google.com", "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4821df2ffe38d629170edc266e65fa05970e0745"}, {"source": "cve-coordination@google.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://kernel.dance/790c2f9d15b594350ae9bca7b236f2b1859de02c"}, {"source": "cve-coordination@google.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html"}, {"source": "cve-coordination@google.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html"}, {"source": "cve-coordination@google.com", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2023/dsa-5492"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Mailing List", "Patch", "Vendor Advisory"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.1.y&id=790c2f9d15b594350ae9bca7b236f2b1859de02c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://kernel.dance/790c2f9d15b594350ae9bca7b236f2b1859de02c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2023/dsa-5492"}], "sourceIdentifier": "cve-coordination@google.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "cve-coordination@google.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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"release_date": "2024-03-12T00:00:00Z"}, {"advisory": "RHSA-2024:0448", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "kernel-0:5.14.0-284.48.1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-01-25T00:00:00Z"}, {"advisory": "RHSA-2024:0439", "cpe": "cpe:/a:redhat:rhel_eus:9.2::nfv", "package": "kernel-rt-0:5.14.0-284.48.1.rt14.333.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-01-25T00:00:00Z"}, {"advisory": "RHSA-2024:0381", "cpe": "cpe:/o:redhat:rhel_eus:9.2", "package": "kpatch-patch", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-01-23T00:00:00Z"}, {"advisory": "RHSA-2024:0412", "cpe": "cpe:/o:redhat:rhev_hypervisor:4.4::el8", "package": "kernel-0:4.18.0-372.87.1.el8_6", "product_name": "Red Hat Virtualization 4 for Red Hat Enterprise Linux 8", "release_date": "2024-01-25T00:00:00Z"}], "bugzilla": {"description": "kernel: use after free in unix_stream_sendpage", "id": "2237760", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2237760"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.6", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation.\nThe 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.\nWe recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c.", "A use-after-free flaw was found in the Linux kernel's af_unix component that allows 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. This issue leads to a race condition where the unix_stream_sendpage() function could access a skb that is being released by garbage collection, resulting in a use-after-free issue."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2023-4622", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2023-09-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-4622\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-4622\nhttps://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.1.y&id=790c2f9d15b594350ae9bca7b236f2b1859de02c"], "threat_severity": "Important"}

{}