Mbed TLS 3.5.x through 3.6.x before 3.6.2 has a buffer underrun in pkwrite when writing an opaque key pair

published 2024-10-15 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-43718

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits: 0; none known

Patch / fix

fixed in 1 distros 3

mbed mbedtls 3.6.2

debian opensuse alpine

mbedtls Debian 14, Debian 13 3.6.2-1

debian advisories DEBIAN-CVE-2024-49195

mbedtls openSUSE Leap 16.0 3.6.6-bp160.1.1
mbedtls openSUSE Tumbleweed 3.6.2-1.1

opensuse advisories openSUSE-SU-2026:21144-1 openSUSE-SU-2024:14419-1

mbedtls Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 3.6.2-r0
mbedtls3 Alpine 3.24 3.6.2-r0

alpine advisories ALPINE-CVE-2024-49195

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 2 y ago (2024-10-17)

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	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-787 Out-of-bounds Write

References

mbed-tls.readthedocs.io /en/latest/tech-updates/security-advisories/
vendor-advisory
mbed-tls.readthedocs.io /en/latest/security-advisories/mbedtls-security-advisory-2024-10-1/
vendor-advisory

Sources

CVE List CVE-2024-49195
NVD CVE-2024-49195

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary