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CVE-2023-3567

Kernel: use after free in vcs_read in drivers/tty/vt/vc_screen.c due to race

Published: 7/24/2023 Last updated: 11/6/2025 Reserved: 7/9/2023

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.

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

Metrics

Version Score Severity Vector String
3.1 7.1 High CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Opam packages affected (29)

albatross cdrom conf-bpftool conf-libbpf conf-linux-libc-dev core core_unix hvsock mirage-block-unix mm ocaml-probes ortools_solvers orun rawlink rawlink-eio rawlink-lwt restricted 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 (10)

Product Vendor Version
Red Hat Enterprise Linux 8.8 Extended Update Support Red Hat < 1b29498669914c7f9afb619722421418a753d372
Red Hat Enterprise Linux 9.2 Extended Update Support Red Hat < 10d75984495f7fe62152c3b0dbfa3f0a6b739c9b
Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 Red Hat < abe3cfb7a7c8e907b312c7dbd7bf4d142b745aa8
Red Hat Enterprise Linux 7 Red Hat < 99fb654d01dc3f08b5905c663ad6c89a9d83302f
Red Hat Enterprise Linux 8 Red Hat < d90419b8b8322b6924f6da9da952647f2dadc21b
Red Hat Enterprise Linux 9 Red Hat < cc9a12e12808af178c600cc485338bac2e37d2a8
Red Hat Enterprise Linux 9.0 Extended Update Support Red Hat < df1875084898b15cbc42f712e93d7f113ae6271b
Red Hat Enterprise Linux 8 Red Hat <= 6.1.*
Red Hat Enterprise Linux 9.2 Extended Update Support Red Hat < c69b442125bf009fce26e15aa5616caf8a3673c3
Red Hat Enterprise Linux 7 Red Hat < c548b99e1c37db6f7df86ecfe9a1f895d6c5966e

References (52)