{"id":"CVE-2023-3611","revision":"9b33bd9d46734b7fb0676ceef977f1fe","records":[{"revision":"9b33bd9d46734b7fb0676ceef977f1fe","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-3611","aliases":[],"title":"Out-of-bounds write in Linux kernel's net/sched: sch_qfq component","description":"An out-of-bounds write vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation.\n\nThe qfq_change_agg() function in net/sched/sch_qfq.c allows an out-of-bounds write because lmax is updated according to packet sizes without bounds checks.\n\nWe recommend upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64.","state":0,"publishedAt":"2023-07-21T20:49:10.812+00:00","modifiedAt":"2026-10-14T21:13:41.685+00:00","affected":[{"ecosystem":"Vendor product","name":"kernel","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageName\": \"kernel\",\n                    \"product\": \"Kernel\",\n                    \"repo\": \"https://git.kernel.org\",\n                    \"vendor\": \"Linux\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"6.5\",\n                            \"status\": \"affected\",\n                            \"version\": \"3.8\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e337087c3b5805fe0b8a46ba622a962880b5d64","https://kernel.dance/3e337087c3b5805fe0b8a46ba622a962880b5d64","https://www.debian.org/security/2023/dsa-5480","https://security.netapp.com/advisory/ntap-20230908-0002/","https://www.debian.org/security/2023/dsa-5492","https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html","https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-3611","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-3611","identifiers":["CVE-2023-3611"]},"retained":false,"historicalAffected":[]}],"coverage":[]}