CVE-2026-123597

rust-hickory-net: Hickory DNS hickory-proto 0.25.0-alpha.1 through 0.26.0-alpha.1 and hickory-net before 0.26.2 contain a logic bug in...

CVE-2026-123597 is fixed in rust-hickory-net on 1 platform by DEBIAN-CVE-2026-123597 (version 0.26.3-1), released November 9, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
3.7
low
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0022
12th percentile

Hickory DNS hickory-proto 0.25.0-alpha.1 through 0.26.0-alpha.1 and hickory-net before 0.26.2 contain a logic bug in DnssecDnsHandle's DS-fetch path that caches transient DS lookup errors as Bogus DNSSEC validation verdicts. An attacker who induces a SERVFAIL, REFUSED, or timeout response to a child-zone DS sub-query causes the validator to return SERVFAIL for all names under that zone until the cache entry's TTL expires.

Where it's fixed

ProductFixed inFixReleased
Linux
rust-hickory-net · Debian 14 0.26.3-1 DEBIAN-CVE-2026-123597 Nov 9, 2026

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