# CVE-2026-42002: pdns: Concurrency and locking defects in GSS-TSIG

CVE-2026-42002 is fixed in pdns on 1 platform, first by DEBIAN-CVE-2026-42002, released May 27, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-42002
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0026
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 21, 2026

## Description

Concurrency and locking defects in GSS-TSIG

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | pdns Debian 13.5 (trixie) | 4.9.15-0+deb13u1 | [DEBIAN-CVE-2026-42002](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42002.md) | May 27, 2026 |
| Linux | pdns Debian 14 | 5.0.5-1 | [DEBIAN-CVE-2026-42002](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42002.md) | May 27, 2026 |

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Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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