Windows GDI+ Buffer Over-read Denial of Service Vulnerability
CVE-2026-20846 is a denial-of-service vulnerability in Windows GDI+ caused by a buffer over-read. According to the provided content, the flaw allows an unauthorized attacker to trigger the condition over a network. The available information identifies the affected component as Windows GDI+ and the vulnerability class as a buffer over-read, but does not provide additional technical detail such as the specific vulnerable function, parsing pathway, or input format involved.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A denial-of-service vulnerability affecting Windows GDI+.
A vulnerability affecting Windows GDI+; specific impact type not provided in the content.
A denial of service vulnerability in Windows GDI+ (no additional details provided in the content).
A denial-of-service vulnerability in Windows GDI+.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.