CVE-2020-14346

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

A flaw was found in xorg-x11-server before 1.20.9. An integer underflow in the X input extension protocol decoding in the X server may lead to arbitrary access of memory contents. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-191

Affected software

Vendor	Product	Versions
n/a	xorg-x11-server	before xorg-x11-server 1.20.9

References

https://bugzilla.redhat.com/show_bug.cgi?id=1862246Issue Tracking, Third Party Advisory
https://lists.x.org/archives/xorg-announce/2020-August/003058.htmlMailing List, Patch, Vendor Advisory
https://security.gentoo.org/glsa/202012-01Third Party Advisory
https://usn.ubuntu.com/4488-2/Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1417/Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1862246Issue Tracking, Third Party Advisory
https://lists.x.org/archives/xorg-announce/2020-August/003058.htmlMailing List, Patch, Vendor Advisory
https://security.gentoo.org/glsa/202012-01Third Party Advisory
https://usn.ubuntu.com/4488-2/Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1417/Third Party Advisory, VDB Entry

Timeline

Published: Sep 15, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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