High severity · published Jul 20, 2025
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
7.5
CVSS
0.6%
EPSS
No
On KEV
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:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MB
mbedtls · Mbed
before 3.6.4 · source: vendor
MT
Mbed Tls · Arm
before 3.6.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-48965
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-48965
Mitigation
https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-6.md
Vendor Advisory
https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/
lists.debian.org
https://lists.debian.org/debian-lts-announce/2025/08/msg00013.html
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