CVE-2026-19033 on Cyberus Linux 26.05

Aliases: CVE-2026-19033

Packages: bind

Status: In Progress

Advisory Information

For a secondary zone with transfers restricted by TSIG, named may start to serve the data provided in a zone transfer before the final message with the TSIG signature arrives. This could allow an attacker that does not actually possess a valid TSIG signature to send unauthorized zone contents to a secondary server. Although no TSIG signature ever arrives, named does not rollback to the pre-transfer state. To exploit the vulnerability, the transfer must be a multi-message TCP IXFR, as described by RFC 8945. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.

Updates

2026-09-22 11:00 CEST

Metadata changes:

• Status for package bind: “In Progress”

2026-09-22 10:58 CEST

Metadata changes:

• Status for package bind: “New”