CVE-2025-27810 Affecting mbedtls package, versions <2.16.4-1ubuntu2+esm1


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.1% (28th percentile)

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  • Snyk IDSNYK-UBUNTU2004-MBEDTLS-9512960
  • published9 Oct 2025
  • disclosed25 Mar 2025

Introduced: 25 Mar 2025

CVE-2025-27810  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 mbedtls to version 2.16.4-1ubuntu2+esm1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mbedtls package and not the mbedtls package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

Mbed TLS before 2.28.10 and 3.x before 3.6.3, in some cases of failed memory allocation or hardware errors, uses uninitialized stack memory to compose the TLS Finished message, potentially leading to authentication bypasses such as replays.

CVSS Base Scores

version 3.1