Out-of-bounds Read Affecting mbedtls package, versions <3.6.4-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.05% (15th percentile)

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  • Snyk IDSNYK-ALPINE321-MBEDTLS-10876292
  • published22 Jul 2025
  • disclosed4 Jul 2025

Introduced: 4 Jul 2025

NewCVE-2025-49601  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Alpine:3.21 mbedtls to version 3.6.4-r0 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 Alpine. See How to fix? for Alpine:3.21 relevant fixed versions and status.

In MbedTLS 3.3.0 before 3.6.4, mbedtls_lms_import_public_key does not check that the input buffer is at least 4 bytes before reading a 32-bit field, allowing a possible out-of-bounds read on truncated input. Specifically, an out-of-bounds read in mbedtls_lms_import_public_key allows context-dependent attackers to trigger a crash or limited adjacent-memory disclosure by supplying a truncated LMS (Leighton-Micali Signature) public-key buffer under four bytes. An LMS public key starts with a 4-byte type indicator. The function mbedtls_lms_import_public_key reads this type indicator before validating the size of its input.

CVSS Base Scores

version 3.1