CVE-2026-88807
📛 CVE Title
libXrender RenderQueryPictFormats Reply Heap-based Buffer Overflow
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.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- suse
- CVSS severity
- HIGH
- CVSS score
- 8.9 / 10
- CVSS 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- Effective score
- 8.9 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-122 - Reserved
- 2026-09-10
- Published
- 2026-09-21 13:49 UTC
- Last updated
- 2026-09-21 14:48 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/88xxx/CVE-2026-88807.json
- Linked Threat
- CVE-2026-88807 — libXrender RenderQueryPictFormats Reply Heap-based Buffer Overflow
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-09-21 14:17:22 UTC
- NVD last modified
- 2026-09-21 15:17:34 UTC
NVD / KEV / EPSS data refreshed 2026-09-22 03:26 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-83916 - Assigner
- suse
- Published
- Sep 21, 2026, 1:49:21 PM
- Updated
- Sep 22, 2026, 3:55:46 AM
- EUVD base score (CVSS 4.0)
-
8.9 / 10
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 - EUVD-reported EPSS
- 0.0000
- Vendors
- X.org
- Products
-
libXrender (0 <0.9.13)
- Aliases
-
GHSA-52cp-fjgx-xr28
ENISA 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.
EUVD references (1)
Microsoft Security Response Center MSRC
Microsoft's vendor-authoritative record from the Security Update Guide — its own CVSS score, impact, severity rating, exploit assessment, and KB-article fixes. Refreshed 2026-09-26 03:08 UTC (source: CVRF).
- MS severity
- Moderate
- Release
- 2026-Sep
Microsoft remediations / KB articles (2)
- Release Notes — Vendor Fix / Security Update
- https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade — None Available / Release Notes
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| X.org | libXrender |
0 (affected)
|
— |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
Web references (2)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- Vendor Fix msrc
- MSRC update guide: CVE-2026-88807 msrc
NVD-tagged references (1)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
Remediations (10)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:blog.qualys.com
The August 2026 Microsoft Patch Tuesday release delivers security fixes for vulnerabilities affecting a wide range of Microsoft products and services.
2026-09-22 16:46 UTC -
web:learn.microsoft.com
Learning path Learn how Microsoft supports secure software development as part of a cybersecurity solution - Training Secure software development means integrating security into each phase of your development lifecycle, from requirements analysis to maintenance. Microsoft provides many services that can help you develop more secure code and deploy a more secure application in the cloud. This ...
2026-09-22 16:46 UTC -
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-09-22 16:46 UTC -
web:msrc.microsoft.com
Security Update Guide - Microsoft Security Response Center
2026-09-22 16:46 UTC -
web:senserva.com
Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.
2026-09-22 16:46 UTC -
web:support.servicenow.com
Due to additional analysis provided by the security researcher who discovered CVE - 2026 -6876, we have upgraded the severity rating of CVE - 2026 -6876 from High to Critical. This change affects only the severity
2026-09-22 16:46 UTC -
web:windowsforum.com
Microsoft's Fastest Fix Is a Mitigation , Not a Patch The important detail in Microsoft's May 14 notice is that there is no permanent Exchange security update available yet for CVE - 2026 -42897. Microsoft says it is working on one and will release it later for affected supported paths, but today's defensive action is mitigation .
2026-09-22 16:46 UTC -
web:www.cisecurity.org
<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...
2026-09-22 16:46 UTC -
web:www.computerworld.com
August's Patch Tuesday is a big one: 751 fixes, an exploited WinSock flaw and plenty of critical Windows, Office and Exchange issues.
2026-09-22 16:46 UTC -
web:www.cvefind.com
Full details for CVE-2026-88807 : technical description, impact, CVSS/EPSS scores, linked CWE, CAPEC, affected CPEs, disclosure date, and mitigation options.
2026-09-22 16:46 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-88807.json.
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