Bug 2451308 (CVE-2026-3119)

Summary: CVE-2026-3119 bind: BIND: Denial of Service via authenticated TKEY queries
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in BIND, specifically within the `named` daemon. An authenticated remote attacker, possessing a valid Transaction Signature (TSIG) key configured on the server, could send a specially crafted query containing a TKEY record. This action may cause the `named` daemon to crash, leading to a Denial of Service (DoS) for the affected DNS service.
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Bug Depends On: 2451356, 2451357    
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Description OSIDB Bzimport 2026-03-25 14:02:30 UTC 
Under certain conditions, `named` may crash when processing a correctly signed query containing a TKEY record. The affected code can only be reached if an incoming request has a valid transaction signature (TSIG) from a key declared in the `named` configuration.
This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1.
BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.