# CVE-2025-59438: mbedtls: Mbed TLS through 3.6.4 has an Observable Timing Discrepancy.

CVE-2025-59438 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2025-59438, released October 21, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-59438
- Priority: Routine
- CVSS: 5.3 (medium)
- EPSS: 0.0026
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 21, 2025

## Description

Mbed TLS through 3.6.4 has an Observable Timing Discrepancy.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | mbedtls Debian 13.5 (trixie) | 3.6.5-0.1~deb13u1 | [DEBIAN-CVE-2025-59438](https://patchblox.com/security/data/fix/linux/debian-cve-2025-59438.md) | Oct 21, 2025 |
| Linux | mbedtls Debian 14 | 3.6.5-0.1 | [DEBIAN-CVE-2025-59438](https://patchblox.com/security/data/fix/linux/debian-cve-2025-59438.md) | Oct 21, 2025 |
| Linux | mbedtls opensuse-leap 16.0 | 3.6.6-bp160.1.1 | [OPENSUSE-SU-2026:21144-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21144-1.md) | Jun 22, 2026 |
| Linux | mbedtls-2 opensuse-leap 16.0 | 2.28.10-bp160.2.1 | [OPENSUSE-SU-2026:21864-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21864-1.md) | Sep 16, 2026 |
| Linux | micropython opensuse-leap 16.0 | 1.26.0-bp160.1.1 | [OPENSUSE-SU-2025:20035-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20035-1.md) | Nov 10, 2025 |
| Linux | ovmf opensuse-leap 16.0 | 202502-160000.4.1 | [OPENSUSE-SU-2026:20499-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20499-1.md) | Apr 9, 2026 |
| Linux | ovmf sles 15.7 | 202408-150700.3.15.1 | [SUSE-SU-2026:1413-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1413-1.md) | Apr 16, 2026 |
| Linux | ovmf sles 16.0 | 202502-160000.4.1 | [SUSE-SU-2026:21161-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-21161-1.md) | Apr 9, 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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