Mbed TLS 3.2.x through 3.4.x before 3.5 has a Buffer Overflow that can lead to remote Code execution.

published 2023-10-07 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-49506

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 69%
public exploits: 0; none known

Patch / fix

fixed in 1 distros 1

mbed mbedtls 3.5

mbedtls openSUSE Tumbleweed 3.5.0-1.1

opensuse advisories openSUSE-SU-2024:13321-1

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 2 y ago (2024-09-19)

Exploit prediction

1.26% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

mbed mbedtls

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input

References

mbed-tls.readthedocs.io /en/latest/security-advisories/mbedtls-security-advisory-2023-10-2/
vendor-advisory

Sources

CVE List CVE-2023-45199
NVD CVE-2023-45199

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary