Dangling Pointer Vulnerability in X.Org
CVE-2022-4283

7.8HIGH

Key Information:

Vendor

X.org

Status
Xorg-x11-server
Vendor
CVE Published:
14 December 2022

What is CVE-2022-4283?

A vulnerability in X.Org arises from the XkbCopyNames function, which improperly manages memory, leaving a dangling pointer after freeing memory. This flaw permits out-of-bounds memory access during subsequent XkbGetKbdByName requests. As a result, attackers can achieve local privilege escalation on systems running the X server with elevated privileges and remote code execution via SSH X forwarding sessions, posing a significant security risk.

Affected Version(s)

xorg-x11-server xorg-x11-server-1.20.4

References

https://bugzilla.redhat.com/show_bug.cgi?id=2151761
https://access.redhat.com/security/cve/CVE-2022-4283
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisory

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.