# CVE-2026-39824: Invoking  integer overflow in NewNTUnicodeString in golang.org/x/sys/windows

CVE-2026-39824 is fixed in 3 products on 1 platform, first by OPENSUSE-SU-2026:21436-1, released July 22, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-39824
- Priority: Routine
- CVSS: 3.3 (Low)
- EPSS: 0.0011
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 27, 2026
- Weakness: Integer Overflow or Wraparound
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-39824

## Description

This update for keybase-client fixes the following issues:  Changes in keybase-client:  - CVE-2026-39824: failure to reject ASCII-only Punycode-encoded labels

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | govulncheck-vulndb opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | [OPENSUSE-SU-2026:21483-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21483-1.md) | Jul 30, 2026 |
| Linux | keybase-client opensuse-leap 16.0 | 6.6.3-bp160.2.1 | [OPENSUSE-SU-2026:21492-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21492-1.md) | Jul 29, 2026 |
| Linux | rclone opensuse-leap 16.0 | 1.74.4-bp160.1.1 | [OPENSUSE-SU-2026:21436-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21436-1.md) | Jul 22, 2026 |

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Data as of 2026-11-09T13:31:49Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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