CVE-2025-59438

Mbed TLS through 3.6.4 has an Observable Timing Discrepancy.

Published: 2025-10-21 Last update: 2025-10-23 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-59438 is rated Low Risk (25/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.04%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-59438

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-19 0.06% 0.04% -0.02%
2 2026-02-20 0.03% 0.06% +0.03%
3 2025-10-22 — 0.03% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-59438

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-59438

OS Trackers for CVE-2025-59438

vendor priority summary link
alpine medium CVE-2025-59438: 1 source package rows (mbedtls); 5 state rows across 5 repos (3.20-main, 3.21-main, 3.22-main, 3.23-main, edge-main); fixed 5, open 0. https://security.alpinelinux.org/vuln/CVE-2025-59438
debian not yet assigned CVE-2025-59438 not yet assigned priority: Debian including 1 source packages (mbedtls), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. https://security-tracker.debian.org/tracker/CVE-2025-59438
suse medium CVE-2025-59438 severity moderate: SUSE including 107 source package names (libeverest-3.6.5-1.1, libeverest-x86-64-v3-3.6.5-1.1, …), 1170 product×package rows across 44 product lines (SLES-LTSS-TERADATA 15 SP2, SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS, … (44 product lines)): Known Not Affected 1129, Fixed 37, First Fixed 4. https://www.suse.com/security/cve/CVE-2025-59438/
ubuntu medium CVE-2025-59438 medium priority: Ubuntu including 1 source packages (mbedtls), 8 status rows across 8 suites (bionic, focal, jammy, noble, plucky, questing, upstream, xenial): ignored 6, needed 1, released 1. https://ubuntu.com/security/CVE-2025-59438

Affected software / configurations for CVE-2025-59438

Vendor Product Version Raw CPE
arm mbed_tls < 3.6.5 cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*

References for CVE-2025-59438

cvelogic Threat Intelligence