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CVE-2023-39198

Kernel: qxl: race condition leading to use-after-free in qxl_mode_dumb_create()

Published: 11/9/2023 Last updated: 11/6/2025 Reserved: 7/25/2023

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.

CNA assigner: redhat (53f830b8-0a3f-465b-8143-3b8a9948e749) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 7.5 High CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Opam packages affected (27)

albatross cdrom conf-bpftool conf-libbpf conf-linux-libc-dev core core_unix hvsock mirage-block-unix mm ocaml-probes orun rawlink rawlink-eio rawlink-lwt shell solo5 solo5-bindings-hvt solo5-bindings-spt solo5-cross-aarch64 solo5-kernel-ukvm tracy-client tuntap uring vhd-format vhd-format-lwt xapi-stdext-unix

Products affected (16)

Product Vendor Version
Red Hat Enterprise Linux 9 Red Hat 15.2(4)M9
Red Hat Enterprise Linux 9 Red Hat n/a
Red Hat Enterprise Linux 6 Red Hat n/a
Red Hat Enterprise Linux 7 Red Hat 12.4(24)MDB6
Red Hat Enterprise Linux 6 Red Hat 2.3
Red Hat Enterprise Linux 7 Red Hat < 6.3.9600.20069
Red Hat Enterprise Linux 8 Red Hat n/a
Red Hat Enterprise Linux 9 Red Hat <1.2.4
Red Hat Enterprise Linux 9 Red Hat n/a
Red Hat Enterprise Linux 8 Red Hat 15.2(4)M5
Red Hat Enterprise Linux 9 Red Hat n/a
Red Hat Enterprise Linux 7 Red Hat < 2020.1.32
Red Hat Enterprise Linux 9 Red Hat < 10.0.22000.3197
Red Hat Enterprise Linux 8 Red Hat n/a
Red Hat Enterprise Linux 7 Red Hat 12.4(24)MDB9
Red Hat Enterprise Linux 8 Red Hat < 10.0.20348.2700

References (22)