High severity7.5NVD Advisory· Published Apr 1, 2026· Updated Apr 3, 2026

CVE-2026-34874

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.

Affected products

Arm/Mbed Tls2 versions
cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*range: >=3.5.0,<3.6.6
- cpe:2.3:a:arm:mbed_tls:4.0.0:*:*:*:*:*:*:*

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

mbed-tls.readthedocs.io/en/latest/security-advisories/nvdVendor Advisory
mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-null-pointer-dereference-x509/nvdVendor Advisory

News mentions

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