CVE-2026-34874 — NULL Pointer Dereference in ARM Mbed TLS

CWE-476 — NULL Pointer Dereference9 documents7 sources
Severity
7.5HIGHNVD
EPSS
0.1%
top 77.95%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
ARM Mbed TLS
Timeline
PublishedApr 1
Latest updateApr 2

Description

An issue was discovered in Mbed TLS through 3.6.5 and 4.x through 4.0.0. There is a NULL pointer dereference in distinguished name parsing that allows an attacker to write to address 0.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages1 packages

▶NVDarm/mbed_tls3.5.0 — 3.6.6+1

🔴Vulnerability Details

4
OSV
CVE-2026-34874: (An issue was discovered in Mbed TLS through 3↗2026-04-02
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GHSA
GHSA-5jpv-5p2x-4fwv: An issue was discovered in Mbed TLS through 3↗2026-04-01
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CVEList
CVE-2026-34874: An issue was discovered in Mbed TLS through 3↗2026-04-01
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OSV
CVE-2026-34874: An issue was discovered in Mbed TLS through 3↗2026-04-01
▶

📋Vendor Advisories

1
Debian
CVE-2026-34874: mbedtls - An issue was discovered in Mbed TLS through 3.6.5 and 4.x through 4.0.0. There i...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-34874 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

2
Bugzilla
CVE-2026-34874 micropython: NULL pointer dereference when setting a distinguished name [fedora-all]↗2026-04-01
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Bugzilla
CVE-2026-34874 mbedtls: NULL pointer dereference when setting a distinguished name [fedora-all]↗2026-04-01
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CVE-2026-34874 — NULL Pointer Dereference in ARM | cvebase