Crash when handling long CNAME response in net
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.8%
exploitation probability
0.8%top 46% of all CVEs
observed exploitation
nono source reports it
When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Go standard library · netReferences
https://access.redhat.com/errata/RHSA-2026:23262https://access.redhat.com/errata/RHSA-2026:23264https://access.redhat.com/errata/RHSA-2026:33120https://access.redhat.com/errata/RHSA-2026:33123https://access.redhat.com/errata/RHSA-2026:33142https://access.redhat.com/errata/RHSA-2026:33150https://access.redhat.com/errata/RHSA-2026:33574https://access.redhat.com/errata/RHSA-2026:34357https://access.redhat.com/errata/RHSA-2026:34359https://access.redhat.com/errata/RHSA-2026:34364https://access.redhat.com/errata/RHSA-2026:35832https://access.redhat.com/errata/RHSA-2026:35993