Vulnerability · Published Oct 21, 2025 · Assigned by mitre
CVE-2025-59438
Medium 5.3
In plain English
A medium-severity security flaw in the mbedtls package (Alpine). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.3%top 81.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Mbed TLS through 3.6.4 has an Observable Timing Discrepancy.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | mbedtls | 3.6.5-r0 | ALPINE-CVE-2025-59438 |
| Alpine:v3.21 | mbedtls | 3.6.5-r0 | ALPINE-CVE-2025-59438 |
| Alpine:v3.22 | mbedtls | 3.6.5-r0 | ALPINE-CVE-2025-59438 |
| Alpine:v3.23 | mbedtls | 3.6.5-r0 | ALPINE-CVE-2025-59438 |
| Alpine:v3.24 | mbedtls | 3.6.5-r0 | ALPINE-CVE-2025-59438 |
| Alpine:v3.24 | mbedtls3 | 3.6.5-r0 | ALPINE-CVE-2025-59438 |
| Debian:12 | mbedtls | no fix listed | DEBIAN-CVE-2025-59438 |
| Debian:13 | mbedtls | 3.6.5-0.1~deb13u1 | DEBIAN-CVE-2025-59438 |
| Debian:14 | mbedtls | 3.6.5-0.1 | DEBIAN-CVE-2025-59438 |
| Ubuntu:22.04:LTS | mbedtls | no fix listed | UBUNTU-CVE-2025-59438 |
| Ubuntu:24.04:LTS | mbedtls | no fix listed | UBUNTU-CVE-2025-59438 |
| Ubuntu:25.10 | mbedtls | no fix listed | UBUNTU-CVE-2025-59438 |
Affected products (as reported)
Weakness: CWE-208 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N