# CVE-2026-93657: rust-hickory-resolver: hickory-resolver versions before 0.26.2 fail to propagate bogus DNSSEC proof states through the Resolver::lookup() an...

CVE-2026-93657 is fixed in 3 products on 1 platform, first by RHSA-2026:85848, released September 18, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-93657
- Priority: High
- CVSS: 7.5 (important)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 18, 2026

## Description

hickory-resolver versions before 0.26.2 fail to propagate bogus DNSSEC proof states through the Resolver::lookup() and Resolver::lookup_ip() APIs, allowing invalid records to be returned as successful results. Attackers controlling the answering zone or positioned on the network path can have forged DNS records accepted as validated, bypassing DNSSEC authentication checks.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rust-hickory-resolver Debian 14 | 0.26.3-1 | [DEBIAN-CVE-2026-93657](https://patchblox.com/security/data/fix/linux/debian-cve-2026-93657.md) | Sep 19, 2026 |
| Linux | rust-sequoia-sq RHEL 10 | 1.4.0.1-4.el10_2 | [RHSA-2026:85848](https://patchblox.com/security/data/fix/linux/rhsa-2026-85848.md) | Sep 18, 2026 |
| Linux | rust-sequoia-sq rocky 10 | 0:1.4.0.1-4.el10_2 | [RLSA-2026:85848](https://patchblox.com/security/data/fix/linux/rlsa-2026-85848.md) | Nov 7, 2026 |
| Linux | sequoia-sq almalinux 10 | 1.4.0.1-4.el10_2 | [ALSA-2026:85848](https://patchblox.com/security/data/fix/linux/alsa-2026-85848.md) | Nov 7, 2026 |
| Linux | sequoia-sq ol 10 | 0:1.4.0.1-4.0.1.el10_2 | [ELSA-2026-85848](https://patchblox.com/security/data/fix/linux/elsa-2026-85848.md) | Nov 7, 2026 |

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Data as of 2026-11-09T07:25:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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