CVE-2023-3567

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

State: Published
Severity: 7.1 High
Published: Jul 24, 2023
Updated: Nov 6, 2025
Reserved: Jul 9, 2023

Description

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.

Scores

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

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
Red Hat Enterprise Linux 8Red Hat	0:4.18.0-553.rt7.342.el8_10 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:4.18.0-553.el8_10 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update SupportRed Hat	0:4.18.0-372.87.1.el8_6 and laterNot affected
Red Hat Enterprise Linux 8.8 Extended Update SupportRed Hat	0:4.18.0-477.43.1.el8_8 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:5.14.0-427.13.1.el9_4 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:5.14.0-427.13.1.el9_4 and laterNot affected
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat	0:5.14.0-70.85.1.el9_0 and laterNot affected
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat	0:5.14.0-70.85.1.rt21.156.el9_0 and laterNot affected
Red Hat Enterprise Linux 9.2 Extended Update SupportRed Hat	0:5.14.0-284.48.1.el9_2 and laterNot affected
Red Hat Enterprise Linux 9.2 Extended Update SupportRed Hat	0:5.14.0-284.48.1.rt14.333.el9_2 and laterNot affected
Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Red Hat	0:4.18.0-372.87.1.el8_6 and laterNot affected
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat Enterprise Linux 9Red Hat

References

RHSA-2024:0412vendor-advisory
RHSA-2024:0431vendor-advisory
RHSA-2024:0432vendor-advisory
RHSA-2024:0439vendor-advisory
RHSA-2024:0448vendor-advisory
RHSA-2024:0575vendor-advisory
RHSA-2024:2394vendor-advisory
RHSA-2024:2950vendor-advisory
RHSA-2024:3138vendor-advisory
https://access.redhat.com/security/cve/CVE-2023-3567vdb-entry
RHBZ#2221463issue-tracking
https://www.spinics.net/lists/stable-commits/msg285184.html
http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html
http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html

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