CVE-2023-4921

{"id": "CVE-2023-4921", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-4921", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2024-05-10T04:00:09.695048Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cve-coordination@google.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "cve-coordination@google.com", "affectedData": [{"repo": "https://git.kernel.org", "vendor": "Linux", "product": "Kernel", "versions": [{"status": "affected", "version": "3.8", "lessThan": "6.6", "versionType": "custom"}], "packageName": "kernel", "defaultStatus": "unaffected"}]}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "affectedData": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.0", "lessThan": "V3.1.5", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.0", "lessThan": "V3.1.5", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.0", "lessThan": "V3.1.5", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.0", "lessThan": "V3.1.5", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [{"status": "affected", "version": "0", "lessThan": "V1.1", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.0", "lessThan": "V3.1.5", "versionType": "custom"}], "defaultStatus": "unknown"}]}], "published": "2023-09-12T20:15:10.573", "references": [{"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8fc134fee27f2263988ae38920bc03da416b03d8", "tags": ["Exploit", "Mailing List", "Patch", "Vendor Advisory"], "source": "cve-coordination@google.com"}, {"url": "https://kernel.dance/8fc134fee27f2263988ae38920bc03da416b03d8", "tags": ["Exploit", "Patch", "Vendor Advisory"], "source": "cve-coordination@google.com"}, {"url": "https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve-coordination@google.com"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve-coordination@google.com"}, {"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8fc134fee27f2263988ae38920bc03da416b03d8", "tags": ["Exploit", "Mailing List", "Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://kernel.dance/8fc134fee27f2263988ae38920bc03da416b03d8", "tags": ["Exploit", "Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-398330.html", "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-769027.html", "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-794697.html", "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "cve-coordination@google.com", "description": [{"lang": "en", "value": "CWE-416"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "A use-after-free vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation.\n\nWhen the plug qdisc is used as a class of the qfq qdisc, sending network packets triggers use-after-free in qfq_dequeue() due to the incorrect .peek handler of sch_plug and lack of error checking in agg_dequeue().\n\nWe recommend upgrading past commit 8fc134fee27f2263988ae38920bc03da416b03d8."}, {"lang": "es", "value": "Una vulnerabilidad de use-after-free en el componente net/sched: sch_qfq del kernel de Linux se puede explotar para lograr una escalada de privilegios local. Cuando el complemento qdisc se utiliza como una clase de qfq qdisc, el env\u00edo de paquetes de red activa el uso despu\u00e9s de la liberaci\u00f3n en qfq_dequeue() debido al controlador .peek incorrecto de sch_plug y la falta de verificaci\u00f3n de errores en agg_dequeue(). Recomendamos actualizar al commit anterior 8fc134fee27f2263988ae38920bc03da416b03d8."}], "lastModified": "2026-10-14T22:17:18.763", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3DA76336-C9B6-4087-9782-1FE85F8CCBEA", "versionEndExcluding": "4.14.326", "versionStartIncluding": "3.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D419C7D6-F33D-4EF8-8950-1CB5DDF6A55D", "versionEndExcluding": "4.19.295", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "834BD148-28EC-43A4-A4F5-458124A1E39F", "versionEndExcluding": "5.4.257", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C385B650-53DB-4BFB-83D1-1D8FADF653EF", "versionEndExcluding": "5.10.195", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5913891D-409A-4EEC-9231-F2EF5A493BC7", "versionEndExcluding": "5.15.132", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7353B9B4-AFFC-45DE-840E-1A7D2B00E7AD", "versionEndExcluding": "6.1.54", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CA8C8B88-AF36-445D-A228-AD78F3615373", "versionEndExcluding": "6.5.4", "versionStartIncluding": "6.2"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}], "operator": "OR"}]}], "sourceIdentifier": "cve-coordination@google.com"}