Hickory DNS from 0.26.0 before 0.26.2 contains an integer underflow vulnerability in TSIG RDATA decoding that allows remote attackers to trigger a panic via malformed records. Attackers can send a crafted TSIG record in DNS wire format to cause unchecked subtraction underflow, crashing builds with overflow checks enabled and causing denial of service.
Metrics
Affected Vendors & Products
References
History
Mon, 09 Nov 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Hickory-dns
Hickory-dns hickory-dns |
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| Vendors & Products |
Hickory-dns
Hickory-dns hickory-dns |
Sun, 08 Nov 2026 01:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Hickory DNS from 0.26.0 before 0.26.2 contains an integer underflow vulnerability in TSIG RDATA decoding that allows remote attackers to trigger a panic via malformed records. Attackers can send a crafted TSIG record in DNS wire format to cause unchecked subtraction underflow, crashing builds with overflow checks enabled and causing denial of service. | |
| Title | Hickory DNS from 0.26.0 before 0.26.2 Panic via TSIG RDATA Decoding | |
| Weaknesses | CWE-191 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-11-08T01:38:08.593Z
Updated: 2026-11-13T03:04:27.566Z
Reserved: 2026-11-06T00:53:14.313Z
Link: CVE-2026-123571
No data.
Status : Deferred
Published: 2026-11-08T02:16:49.990
Modified: 2026-11-13T04:17:37.187
Link: CVE-2026-123571
No data.