# CVE-2025-54764: mbedtls: Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operations, and direct calls to mbedtls_mpi_mo...

CVE-2025-54764 is fixed in mbedtls on 1 platform, first by DEBIAN-CVE-2025-54764, released October 20, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-54764
- Priority: Routine
- CVSS: 6.2 (medium)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 20, 2025

## Description

Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operations, and direct calls to mbedtls_mpi_mod_inv or mbedtls_mpi_gcd.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | mbedtls Debian 13.5 (trixie) | 3.6.5-0.1~deb13u1 | [DEBIAN-CVE-2025-54764](https://patchblox.com/security/data/fix/linux/debian-cve-2025-54764.md) | Oct 20, 2025 |
| Linux | mbedtls Debian 14 | 3.6.5-0.1 | [DEBIAN-CVE-2025-54764](https://patchblox.com/security/data/fix/linux/debian-cve-2025-54764.md) | Oct 20, 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 |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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