# RHSA-2025:21034: bind security update

RHSA-2025:21034, released October 22, 2025, fixes 3 CVEs in bind (version 9.18.33-10.el10_1.2). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2025-21034
- Platform: Linux
- Released: Oct 22, 2025
- Priority: High (Closes CVE-2025-8677, high severity)
- CVEs: 3, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2025:21034

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [bind](https://patchblox.com/security/data/product/linux/bind.md) | RHEL 10 | 9.18.33-10.el10_1.2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-8677](https://patchblox.com/security/data/cve/CVE-2025-8677.md) | High | Resource exhaustion via malformed DNSKEY handling | 8.6 | 0.1074 |  |
| [CVE-2025-40778](https://patchblox.com/security/data/cve/CVE-2025-40778.md) | High | Cache poisoning attacks with unsolicited RRs | 8.6 | 0.0067 |  |
| [CVE-2025-40780](https://patchblox.com/security/data/cve/CVE-2025-40780.md) | High | Cache poisoning due to weak PRNG | 8.6 | 0.0047 |  |

---

Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo