# CVE-2023-39198: Kernel: qxl: race condition leading to use-after-free in qxl_mode_dumb_create() Status: published. Published: 2023-11-09. Updated: 2026-11-07. A race condition was found in the QXL driver in the Linux kernel. The qxl_mode_dumb_create() function dereferences the qobj returned by the qxl_gem_object_create_with_handle(), but the handle is the only one holding a reference to it. This flaw allows an attacker to guess the returned handle value and trigger a use-after-free issue, potentially leading to a denial of service or privilege escalation. ## Remediation - workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. (source: CNA: redhat) - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: secalert@redhat.com) — https://bugzilla.redhat.com/show_bug.cgi?id=2218332 - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: af854a3a-2127-422b-91ae-364da2661108) — https://bugzilla.redhat.com/show_bug.cgi?id=2218332 ## Affected products and versions - Red Hat / Red Hat Enterprise Linux 8 (kernel-rt): ≥ 0:4.18.0-553.rt7.342.el8_10; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 8 (kernel): ≥ 0:4.18.0-553.el8_10; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 9 (kernel): ≥ 0:5.14.0-427.13.1.el9_4; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 6 (kernel): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 7 (kernel): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 7 (kernel-rt): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 9 (kernel-rt): Version range not reported. Source: CNA: redhat ## NVD configuration conditions Affected CPE matches depend on the following AND/OR and negation conditions: ```json [ { "negate": false, "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.5", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc6:*:*:*:*:*:*", "vulnerable": true } ], "negate": false, "operator": "OR" } ], "operator": "OR" }, { "negate": false, "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*", "vulnerable": true } ], "negate": false, "operator": "OR" } ], "operator": "OR" }, { "negate": false, "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true } ], "negate": false, "operator": "OR" } ], "operator": "OR" } ] ``` ## Severity and prioritization - CVSS 3.1: 7.5 (high); CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H; source: CNA: redhat - CVSS 3.1: 6.4 (medium); CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H; source: NVD: nvd@nist.gov - CVSS 3.1: 7.5 (high); CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H; source: NVD: secalert@redhat.com - CISA KEV: No listing in collected sources - EPSS: 0.42% as of 2026-11-06; percentile 36.16% - SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP - Weaknesses: CWE-416 ## Exploit evidence No exploit evidence in collected sources. This is not proof of no exploitation. ## References - https://access.redhat.com/errata/RHSA-2024:2394 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2024:2950 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2024:3138 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/security/cve/CVE-2023-39198 (CNA: redhat; vdb-entry, x_refsource_REDHAT) - https://bugzilla.redhat.com/show_bug.cgi?id=2218332 (CNA: redhat; issue-tracking, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2024:2394 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred) - https://access.redhat.com/errata/RHSA-2024:2950 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred) - https://access.redhat.com/errata/RHSA-2024:3138 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred) - https://access.redhat.com/security/cve/CVE-2023-39198 (ADP: CVE; vdb-entry, x_refsource_REDHAT, x_transferred) - https://bugzilla.redhat.com/show_bug.cgi?id=2218332 (ADP: CVE; issue-tracking, x_refsource_REDHAT, x_transferred) - https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html (ADP: CVE; x_transferred) - https://access.redhat.com/errata/RHSA-2024:2394 (secalert@redhat.com) - https://access.redhat.com/errata/RHSA-2024:2950 (secalert@redhat.com) - https://access.redhat.com/errata/RHSA-2024:3138 (secalert@redhat.com) - https://access.redhat.com/security/cve/CVE-2023-39198 (secalert@redhat.com; Issue Tracking, Third Party Advisory) - https://bugzilla.redhat.com/show_bug.cgi?id=2218332 (secalert@redhat.com; Issue Tracking, Patch, Third Party Advisory) - https://access.redhat.com/errata/RHSA-2024:2394 (af854a3a-2127-422b-91ae-364da2661108) - https://access.redhat.com/errata/RHSA-2024:2950 (af854a3a-2127-422b-91ae-364da2661108) - https://access.redhat.com/errata/RHSA-2024:3138 (af854a3a-2127-422b-91ae-364da2661108) - https://access.redhat.com/security/cve/CVE-2023-39198 (af854a3a-2127-422b-91ae-364da2661108; Issue Tracking, Third Party Advisory) - https://bugzilla.redhat.com/show_bug.cgi?id=2218332 (af854a3a-2127-422b-91ae-364da2661108; Issue Tracking, Patch, Third Party Advisory) - https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html (af854a3a-2127-422b-91ae-364da2661108) ## Provenance - CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2023-39198; retrieved 2026-11-07; source updated 2026-11-07 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-39198; retrieved 2026-11-07; source updated 2026-11-07 - FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2023-39198; retrieved 2026-11-07; source updated Not reported Revision: 263c174a838583e552d02daf09a42729f62d9af9507d4f55d82139fc4b115442 Canonical: https://y2.dev/cve/CVE-2023-39198 ## Agent and API access Public CVE pages, Markdown, and JSON are free to read without an account or API key. - Public catalog: https://y2.dev/cve/index.json. 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