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CVE-2017-13721

xorg-x11-server: Insufficient validation of shmseg resource id

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Severity

Low

Red Hat Product Security

3.6

CVSS 3.0

Review impact separately from score.

Published · October 4, 2017

Updated · November 21, 2025

Description

In X.Org Server (aka xserver and xorg-server) before 1.19.4, an attacker authenticated to an X server with the X shared memory extension enabled can cause aborts of the X server or replace shared memory segments of other X clients in the same session.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 3.6
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

CWE-20 · Improper Input Validation