{"id":"CVE-2023-3567","title":"Kernel: use after free in vcs_read in drivers/tty/vt/vc_screen.c due to race","summary":"A use-after-free flaw was found in vcs_read in drivers/tty/vt/vc_screen.c in vc_screen in the Linux Kernel. This issue may allow an attacker with local user access to cause a system crash or leak internal kernel information.","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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 (all versions)","kernel (all versions)","kernel (all versions)","kernel-rt (all versions)","kernel (all versions)","kernel-rt (all versions)","kernel (all versions)","kernel","kernel","kernel-rt","kernel-rt (all versions)"],"published":"2023-07-24","updated":"2026-11-07","sourceUpdated":"2026-11-07T11:32:43.084Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-3567","references":[{"url":"https://access.redhat.com/errata/RHSA-2024:0412","label":"RHSA-2024:0412"},{"url":"https://access.redhat.com/errata/RHSA-2024:0431","label":"RHSA-2024:0431"},{"url":"https://access.redhat.com/errata/RHSA-2024:0432","label":"RHSA-2024:0432"},{"url":"https://access.redhat.com/errata/RHSA-2024:0439","label":"RHSA-2024:0439"},{"url":"https://access.redhat.com/errata/RHSA-2024:0448","label":"RHSA-2024:0448"},{"url":"https://access.redhat.com/errata/RHSA-2024:0575","label":"RHSA-2024:0575"},{"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-2023-3567"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2221463","label":"RHBZ#2221463"},{"url":"https://www.spinics.net/lists/stable-commits/msg285184.html"}],"tags":["cve.org"],"epss":0.00419,"epssPercentile":0.3648,"ingestedAt":"2026-11-07T12:16:41.111Z","slug":"CVE-2023-3567","body":"## Overview\n\nA use-after-free flaw was found in vcs_read in drivers/tty/vt/vc_screen.c in vc_screen in the Linux Kernel. This issue may allow an attacker with local user access to cause a system crash or leak internal kernel information.\n\n## Affected\n\n- `kernel-rt (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel-rt (all versions)`\n- `kernel (all versions)`\n- `kernel-rt (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.\n\n### Workarounds\n\nMitigation for this issue is either not available or the 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.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}