PT-2026-29587 · Arm · Mbed Tls

Haruto Kimura + 1 · CVE-2026-34874 · Published 2026-04-01 · Updated 2026-06-02

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Mbed TLS versions through 3.6.5 and 4.0.0

Description A flaw exists in the distinguished name parsing functionality, leading to a NULL pointer dereference. This can allow an attacker to write to address 0.

Recommendations Update to a version later than 3.6.5. Update to a version later than 4.0.0.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-34874

ECHO-AF70-69C6-547C

OPENSUSE-SU-2026:10498-1

OPENSUSE-SU-2026:10615-1

OPENSUSE-SU-2026:20875-1

SUSE-SU-2026:1952-1

SUSE-SU-2026:21440-1

SUSE-SU-2026:21981-1

SUSE-SU-2026:22016-1

Affected Products

Mbed Tls

References · 28

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34874.json · Exploit
• https://cve.org/CVERecord?id=CVE-2026-34874 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10498-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34874 · Security Note
• https://mbed-tls.readthedocs.io/en/latest/security-advisories · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-34874 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-34874 · Vendor Advisory
• https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-null-pointer-dereference-x509 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-34874 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:22016-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-34874 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10615-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-34874 · Vendor Advisory
• https://suse.com/security/cve/CVE-2026-34874 · Note
• https://suse.com/security/cve/CVE-2026-34871 · Note