Bug 2506619 (CVE-2026-39155)
| Summary: | CVE-2026-39155 knot-dns: knot: Knot DNS: Denial of Service due to incorrect NSEC owner name computation | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | Keywords: | Security |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in Knot DNS. The mod-onlinesign component incorrectly computes the next NSEC (Next Secure) owner name. This can lead to an overly broad authenticated denial interval, allowing DNS (Domain Name System) resolvers that use aggressive negative caching to incorrectly generate negative responses for valid domain names. This ultimately results in a denial of service for legitimate DNS queries.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2520878, 2520879 | ||
| Bug Blocks: | |||
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Description
OSIDB Bzimport
2026-07-23 21:01:19 UTC
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