CVE-2026-93011
A flaw was found in dnsmasq
- Risk score
- 42/100
- CVSS
- 5.3 v3.1
- Exploit chance (30 days)
- 0.6%
- Published
- 29 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 …
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 5.3 medium
References
Original 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.
Last activity 29 Oct 2026. Patch Forecast updates every hour.