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CVE-2025-49087

Good to know:

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Date: July 19, 2025

In Mbed TLS 3.6.1 through 3.6.3 before 3.6.4, a timing discrepancy in block cipher padding removal allows an attacker to recover the plaintext when PKCS#7 padding mode is used.

Severity Score

Related Resources (6)

https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-5.md
https://security-tracker.debian.org/tracker/CVE-2025-49087
https://nvd.nist.gov/vuln/detail/CVE-2025-49087
https://security.alpinelinux.org/vuln/CVE-2025-49087
https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/
https://www.mend.io/vulnerability-database/CVE-2025-49087

Severity Score

Weakness Type (CWE)

Covert Timing Channel

CWE-385

Top Fix

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Upgrade Version

Upgrade to version mbedtls - 3.6.4;https://github.com/Mbed-TLS/mbedtls.git - v3.6.4;https://github.com/Mbed-TLS/mbedtls.git - mbedtls-3.6.4

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

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