CVE-2017-13721

4.7 mediumEPSS 0.4%

Medium (4.7). EPSS 0.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.0

4.7 medium

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

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 29% of CVEs (scores of 2026-10-31)
CWE: CWE-269
Published: 2017-10-10
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

debian:debian_linux
x.org:x_server

References

http://www.debian.org/security/2017/dsa-4000
http://www.openwall.com/lists/oss-security/2017/10/04/10
http://www.securityfocus.com/bid/101238
https://cgit.freedesktop.org/xorg/xserver/commit/?id=b95f25af141d33a65f6f821ea9c003f66a01e1f1
https://lists.x.org/archives/xorg-announce/2017-October/002808.html

Check your stack JSON