{ "dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": { "cveId": "CVE-2023-3776", "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778", "state": "PUBLISHED", "assignerShortName": "Google", "dateReserved": "2023-07-19T15:50:20.757Z", "datePublished": "2023-07-21T20:49:53.667Z", "dateUpdated": "2025-03-05T18:48:04.229Z" }, "containers": { "cna": { "affected": [ { "defaultStatus": "unaffected", "packageName": "kernel", "product": "Kernel", "repo": "https://git.kernel.org", "vendor": "Linux", "versions": [ { "lessThan": "6.5", "status": "affected", "version": "2.6", "versionType": "custom" } ] } ], "credits": [ { "lang": "en", "type": "finder", "user": "00000000-0000-4000-9000-000000000000", "value": "Muhammad Alifa Ramdhan of STAR Labs SG" } ], "datePublic": "2023-07-07T02:10:00.000Z", "descriptions": [ { "lang": "en", "supportingMedia": [ { "base64": false, "type": "text/html", "value": "
A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation.
If tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.
We recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f.
" } ], "value": "A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation.\n\nIf tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.\n\nWe recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f." } ], "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": { "orgId": "14ed7db2-1595-443d-9d34-6215bf890778", "shortName": "Google", "dateUpdated": "2024-02-02T14:06:25.968Z" }, "references": [ { "tags": [ "patch" ], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=0323bce598eea038714f941ce2b22541c46d488f" }, { "url": "https://kernel.dance/0323bce598eea038714f941ce2b22541c46d488f" }, { "url": "https://www.debian.org/security/2023/dsa-5480" }, { "url": "https://www.debian.org/security/2023/dsa-5492" }, { "url": "http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html" }, { "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" }, { "url": "https://security.netapp.com/advisory/ntap-20240202-0003/" } ], "source": { "discovery": "EXTERNAL" }, "title": "Use-after-free in Linux kernel's net/sched: cls_fw component", "x_generator": { "engine": "Vulnogram 0.1.0-dev" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T07:08:49.975Z" }, "title": "CVE Program Container", "references": [ { "tags": [ "patch", "x_transferred" ], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=0323bce598eea038714f941ce2b22541c46d488f" }, { "url": "https://kernel.dance/0323bce598eea038714f941ce2b22541c46d488f", "tags": [ "x_transferred" ] }, { "url": "https://www.debian.org/security/2023/dsa-5480", "tags": [ "x_transferred" ] }, { "url": "https://www.debian.org/security/2023/dsa-5492", "tags": [ "x_transferred" ] }, { "url": "http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html", "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" ] }, { "url": "https://security.netapp.com/advisory/ntap-20240202-0003/", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2025-03-05T18:36:21.985284Z", "id": "CVE-2023-3776", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-03-05T18:48:04.229Z" } } ] } }