CVE-2026-94300highCWE-362CWE-415

CVE-2026-94300: high-severity vulnerability in ISC BIND 9

Concurrent GSS-TSIG messages corrupt memory

Published · Updated

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41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 8.1epss 1.0%
from disclosure to weapon2 days
Published on NVDOct 21
1st PoC+2d
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
ISC · BIND 9
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — ISC BIND 9

In the same product, most dangerous first.

CVE-2018-5740HIGHA flaw in the "deny-answer-aliases" feature can cause an assertion failure in namedEPSS 60.2%CVE-2022-3736HIGHnamed configured to answer from stale cache may terminate unexpectedly while processing RRSIG queriesEPSS 48.4%CVE-2017-3145HIGHImproper fetch cleanup sequencing in the resolver can cause named to crashEPSS 27.7%CVE-2022-3488HIGHnamed may terminate unexpectedly when processing ECS options in repeated responses to iterative queriesEPSS 19.0%CVE-2024-12705HIGHDNS-over-HTTPS implementation suffers from multiple issues under heavy query loadEPSS 18.6%CVE-2017-3143HIGHAn error in TSIG authentication can permit unauthorized dynamic updatesEPSS 18.2%