CVE-2026-65819 Denial of service in gopacket
Attackers can cause a denial of service by sending crafted packets that trigger panics in gopacket layer decoders due to unchecked bounds.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-65819?
CVE-2026-65819 is a high-severity denial of service vulnerability in gopacket, published on 7 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
gopacket provides packet processing capabilities for Go. Through version 1.7.0, multiple layer decoders use attacker-controlled lengths, counts, or offsets before validating them against packet buffers, allowing a crafted packet decoded through DecodingLayerParser or DecodeFromBytes to trigger an unrecovered panic and remotely deny service. A patch commit is available at 210f25f.
Which versions are affected by CVE-2026-65819?
How do I fix CVE-2026-65819?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-65819 being exploited?
There is no known exploitation of CVE-2026-65819 in the wild and no public exploit code.
Sources
Also known as AZL-95490, DEBIAN-CVE-2026-65819, GHSA-8mcr-459q-5mx2, UBUNTU-CVE-2026-65819.