Description
Mbed TLS before 3.6.4 has a PEM parsing one-byte heap-based buffer underflow, in mbedtls_pem_read_buffer and two mbedtls_pk_parse functions, via untrusted PEM input.
Scores
CVSS v3
4.8
EPSS
0.0037
EPSS Percentile
58.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-193
Status
published
Products (1)
arm/mbed_tls
< 3.6.4
Published
Jul 04, 2025
Tracked Since
Feb 18, 2026