CVE-2023-5574: Xorg-x11-server: use-after-free bug in damagedestroy

Severity: high (CVSS 7.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-10-25 · updated 2026-06-23
Weakness: CWE-416

Description

A use-after-free flaw was found in xorg-x11-server-Xvfb. This issue occurs in Xvfb with a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode). If the pointer is warped from a screen 1 to a screen 0, a use-after-free issue may be triggered during shutdown or reset of the Xvfb server, allowing for possible escalation of privileges or denial of service.

Affected products

Red Hat Enterprise Linux: 7.0
xorg-x11-server: from 1.13.0

References

https://access.redhat.com/errata/RHSA-2024:2298
https://access.redhat.com/security/cve/CVE-2023-5574
https://bugzilla.redhat.com/show_bug.cgi?id=2244735
https://lists.x.org/archives/xorg-announce/2023-October/003430.html
https://access.redhat.com/errata/RHSA-2024:2298
https://access.redhat.com/security/cve/CVE-2023-5574
https://bugzilla.redhat.com/show_bug.cgi?id=2244735
https://lists.x.org/archives/xorg-announce/2023-October/003430.html
https://security.netapp.com/advisory/ntap-20231130-0004/

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