CVE-2026-88807

libXrender RenderQueryPictFormats Reply Heap-based Buffer Overflow

Published Sep 21, 2026 CVSS 4.0 · 8.9 High EPSS < 1% KEV · Not listed
Description
A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Weaknesses CWE-120
References
Metrics threat_severity

None

cvssV3_1

{'score': 8.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H'}

threat_severity

Important

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.
Title libXrender RenderQueryPictFormats Reply Heap-based Buffer Overflow
First Time appeared X.org
X.org libxrender
Weaknesses CWE-122
CPEs cpe:2.3:a:x.org:libxrender:*:*:*:*:*:*:*:*
Vendors & Products X.org
X.org libxrender
References
Metrics cvssV4_0

{'score': 8.9, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
suse
Published
Updated
Sep 22, 2026, 3:55 AM
Reserved
Sep 10, 2026, 8:35 AM
Status
Awaiting Analysis
Published
Sep 21, 2026, 2:17 PM
Modified
Sep 22, 2026, 7:40 PM
Severity
Important
Public date
Sep 21, 2026, 1:49 PM