CVE-2026-12245
CVE-2026-12245: 1 tracked advisory record across Red Hat. Compare vendor sources.
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Red Hat
1 advisory- Advisory severityHigh7.5
High [CVE-2026-12245] Denial of DNS over TLS service by any DoT client
CVE-2026-12245Source published Source updated
NSD from version 4.13.0 has a heap use-after-free bug in logging errors on TLS connections, causing a crash of the server process, which can be triggered trivially by sending a DNS query over a DoT connection, and closing the connection without reading the response. A flaw was found in NSD. When NSD is configured with DNS over TLS (DoT), a remote attacker can exploit a vulnerability by performing a TLS action and then prematurely closing the connection. This action causes the server process to crash and restart. By repeatedly exploiting this flaw, an attacker can keep the server in a continuous crash-restart loop, leading to a denial of service for DoT clients. This impact is significant for environments relying on DoT for secure DNS resolution. This vulnerability doesn't affect any…
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
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