VulnerabilityModified

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.

HIGH 7.5EPSS 0.48%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.48%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.48% probability · 40th percentile
CISA KEV: Not listed
Weakness: CWE-696, CWE-476
Affected: arm/mbed tls
Source: cve@mitre.org

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.