CVE-2025-48965 — Incorrect Behavior Order in Mbedtls

CWE-696 — Incorrect Behavior OrderCWE-476 — NULL Pointer Dereference8 documents7 sources
Severity
7.5HIGHNVD
CNA4.0OSV9.8
EPSS
0.1%
top 81.36%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mbed MbedtlsARM Mbed TLS
Timeline
PublishedJul 20
Latest updateMar 25

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 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 Packages4 packages

▶CVEListV5mbed/mbedtls< 3.6.4
▶NVDarm/mbed_tls< 3.6.4
▶Debianmbed/mbedtls< 2.16.9-0.1+deb11u2+2
▶Ubuntumbed/mbedtls< 2.8.0-1ubuntu0.1~esm1+3

🔴Vulnerability Details

4
OSV
mbedtls vulnerabilities↗2026-03-25
▶
GHSA
GHSA-qxjv-288g-w43x: Mbed TLS before 3↗2025-07-20
▶
OSV
CVE-2025-48965: Mbed TLS before 3↗2025-07-20
▶
CVEList
CVE-2025-48965: Mbed TLS before 3↗2025-07-20
▶

📋Vendor Advisories

2
Ubuntu
Mbed TLS vulnerabilities↗2026-03-25
▶
Debian
CVE-2025-48965: mbedtls - Mbed TLS before 3.6.4 has a NULL pointer dereference because mbedtls_asn1_store_...↗2025
▶

💬Community

1
Bugzilla
CVE-2025-48965 micropython: Mbed TLS: NULL Pointer Dereference [fedora-all]↗2025-07-21
▶
CVE-2025-48965 — Incorrect Behavior Order in Mbedtls | cvebase