{"id":"CVE-2023-4133","title":"Kernel: cxgb4: use-after-free in ch_flower_stats_cb()","summary":"A use-after-free vulnerability was found in the cxgb4 driver in the Linux kernel. The bug occurs when the cxgb4 device is detaching due to a possible rearming of the flower_stats_timer from the work queue. This flaw allows a local user t…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-416"],"vendor":"Red Hat","product":"kernel-rt","affected":["kernel-rt (all versions)","kernel (all versions)","kernel (all versions)","kernel (all versions)","kernel","kernel","kernel-rt","kernel-rt (all versions)"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2025-02-26T21:51:04.961885Z"},"published":"2023-08-03","updated":"2026-11-07","sourceUpdated":"2026-11-07T11:31:56.937Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-4133","references":[{"url":"https://access.redhat.com/errata/RHSA-2024:2394","label":"RHSA-2024:2394"},{"url":"https://access.redhat.com/errata/RHSA-2024:2950","label":"RHSA-2024:2950"},{"url":"https://access.redhat.com/errata/RHSA-2024:3138","label":"RHSA-2024:3138"},{"url":"https://access.redhat.com/security/cve/CVE-2023-4133"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2221702","label":"RHBZ#2221702"}],"tags":["cve.org"],"epss":0.00228,"epssPercentile":0.13675,"ingestedAt":"2026-11-07T12:16:41.118Z","slug":"CVE-2023-4133","body":"## Overview\n\nA use-after-free vulnerability was found in the cxgb4 driver in the Linux kernel. The bug occurs when the cxgb4 device is detaching due to a possible rearming of the flower_stats_timer from the work queue. This flaw allows a local user to crash the system, causing a denial of service condition.\n\n## Affected\n\n- `kernel-rt (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel`\n- `kernel`\n- `kernel-rt`\n- `kernel-rt (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}