CVE-2025-52496 | BDVDB-2026-284849 Detail

Mbedmbedtls

Description#

Mbed TLS before 3.6.4 has a race condition in AESNI detection if certain compiler optimizations occur. An attacker may be able to extract an AES key from a multithreaded program, or perform a GCM forgery.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact none. Attack vector: local.

Weaknesses#

CWE-733 Compiler Optimization Removal or Modification of Security-critical Code

References#

Exploit#

No public exploit known

History#

Version 12025-07-04Record published in the CVE List.
Version 22025-11-03Most recent update recorded in the CVE List.

Published

Published: 2025-07-04
Last modified: 2025-11-03

Vendor information

Vendor: Mbed
Product: mbedtls

All Mbed vulnerabilities

Score

7.8 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 11.8.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 3.6.4
Fixed
3.6.4

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.8 High

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Metric breakdown
Attack Vector	Local
Attack Complexity	High
Privileges Required	None
User Interaction	None
Scope	Changed
Confidentiality	High
Integrity	High
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).