JLSEC-2025-230 High 7.5

Mbed TLS before 3.6.4 has a NULL pointer dereference because `mbedtls_asn1_store_named_data` can...

JLSEC Published: Nov 21, 2025
Modified: Jul 23, 2026
Severity: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Packages: MbedTLS_jll < 2.28.1010+0
Upstream: CVE-2025-48965

Mbed TLS before 3.6.4 has a NULL pointer dereference because mbedtls_asn1_store_named_data can trigger conflicting data with val.p of NULL but val.len greater than zero.

References

https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-6.md
https://lists.debian.org/debian-lts-announce/2025/08/msg00013.html
https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/