HIGH 8.1 NVD
CVE-2026-94300
Replaying GSS-TSIG signed UDP messages can result in memory corruption in "`named`". An attacker who can capture a previously signed UDP message can replay it
Replaying GSS-TSIG signed UDP messages can result in memory corruption in "`named`". An attacker who can capture a previously signed UDP message can replay it while the negotiated TSIG key is still valid. By also sending crafted queries to a zone the attacker controls, the attacker may potentially achieve remote code execution.
This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1.
Remediation
$ sudo apt install --only-upgrade bind9References
- https://downloads.isc.org/isc/bind9/9.20.30
- https://downloads.isc.org/isc/bind9/9.21.27
- https://kb.isc.org/docs/cve-2026-94300
This high severity vulnerability with a CVSS score of 8.1 was published on 2026-10-21 via NVD. A remediation command is available below.
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