7.8

CVE-2025-52496: arm mbed_tls

CVSS: 7.8v3.1HighModified
AliasesALPINE-CVE-2025-52496UBUNTU-CVE-2025-52496DEBIAN-CVE-2025-52496
Published 04-07-2025Last modified 03-11-2025
Open JSON

Vulnerability summary

CVE-2025-52496 is a high (CVSS 7.8) vulnerability in arm mbed_tls. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
41/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.21%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 5 · Related 4
DLA-4274-1OPENSUSE-SU-2026:11790-1OPENSUSE-SU-2026:21144-1OPENSUSE-SU-2026:21864-1USN-8123-1

Timeline

  1. 04-07-2025
    PublishedVulnerability first disclosed.
  2. 03-11-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

+0.03 pp

From 0.19% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.21%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Mbedtls Docs

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Alpine1 product
  • mbedtls< 3.6.4-r0
Arm1 product
Debian1 product
  • mbedtlsAll versions (No fix recorded) | < 3.6.4-1
Mbed1 product
Ubuntu1 product
  • mbedtlsAll versions (No fix recorded) | < 2.8.0-1ubuntu0.1~esm1 | < 2.16.4-1ubuntu2+esm1 | < 2.28.0-1ubuntu0.1~esm1 | < 2.28.8-1ubuntu0.1~esm1

5 vendors · 5 products

References

7 links