CVE-2026-93011
Medium
Description
A flaw was found in dnsmasq. After a reduction of internal domain-name buffer sizes, the DNSSEC validator can write a few bytes past a name buffer when converting names to and from DNS wire format. An attacker who can cause the server to validate a crafted DNSSEC response may overwrite a small amount of adjacent heap metadata. DNSSEC support is not compiled in by default and must also be enabled at runtime.
SeverityMedium
CVSS5.3
Exploit probability51. percentile0.6%
Product
Microsoft Azl3 Dnsmasq
PublishedOct 29, 2026
First seenNov 4, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft azl3_dnsmasq_2.93-1 | No range specified | — |
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