# CVE-2026-46600: Parsing an invalid SVCB or HTTPS RR can panic in golang.org/x/net/dns/dnsmessage

CVE-2026-46600 is fixed in 8 products on 2 platforms, first by DEBIAN-CVE-2026-46600, released July 24, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-46600
- Priority: High
- CVSS: 7.5 (Moderate)
- EPSS: 0.0055
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 21, 2026
- Weakness: Out-of-bounds Read
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-46600

## Description

Parsing an invalid SVCB or HTTPS RR can panic when the size of a parameter value overflows the message buffer.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Go Programming Language | 1.27.3 | [Go Programming Language 1.27.3](https://patchblox.com/security/data/fix/windows-app/golang.go-1.27.3.md) | Oct 19, 2026 |
| Linux | alloy opensuse-leap 16.0 | 1.19.2-160000.1.1 | [OPENSUSE-SU-2026:22032-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22032-1.md) | Oct 6, 2026 |
| Linux | alloy sles 15.7 | 1.19.2-150700.15.29.1 | [SUSE-SU-2026:4408-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4408-1.md) | Oct 1, 2026 |
| Linux | alloy sles 16.0 | 1.19.2-160000.1.1 | [SUSE-SU-2026:24148-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24148-1.md) | Oct 6, 2026 |
| Linux | golang-golang-x-net Debian 14 | 1:0.56.0-1 | [DEBIAN-CVE-2026-46600](https://patchblox.com/security/data/fix/linux/debian-cve-2026-46600.md) | Jul 24, 2026 |
| Linux | govulncheck-vulndb opensuse-leap 16.0 | 0.0.20260827T195228-160000.1.1 | [OPENSUSE-SU-2026:21761-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21761-1.md) | Sep 4, 2026 |
| Linux | govulncheck-vulndb sles 16.0 | 0.0.20260827T195228-160000.1.1 | [SUSE-SU-2026:23625-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23625-1.md) | Sep 4, 2026 |
| Linux | kubevirt sles 15.7 | 1.7.4-150700.3.33.1 | [SUSE-SU-2026:3480-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3480-1.md) | Aug 4, 2026 |
| Linux | kubevirt-1.6 sles 15.7 | 1.6.6-150700.15.17.1 | [SUSE-SU-2026:3630-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3630-1.md) | Aug 17, 2026 |
| Linux | kubevirt1.8 opensuse-leap 16.0 | 1.8.4-160000.1.1 | [OPENSUSE-SU-2026:21590-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21590-1.md) | Aug 18, 2026 |
| Linux | rclone opensuse-leap 16.0 | 1.75.1-bp160.1.1 | [OPENSUSE-SU-2026:21999-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21999-1.md) | Sep 28, 2026 |

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Data as of 2026-11-08T13:06:02Z 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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