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CVE-2026-11721 on CTRL-OS 26.05

Aliases: CVE-2026-11721

Packages: bind

Status: Plausible

Advisory Information

It is possible for an attacker's zone to respond to a query with an RRSIG that has a smaller number of labels than the zone in which the RRSIG is contained. This causes named to produce a wildcard name for a zone that is shorter than the attacker's zone, which can result in cache poisoning. For this attack to have any effect, the resolver under attack must have set synth-from-dnssec yes; (which is the default). This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

Updates

2026-07-23 23:45 CEST

Metadata changes:

  • Status for package bind: “Plausible”

2026-07-23 23:40 CEST

Metadata changes:

  • Status for package bind: “New”