Out-of-bounds read in mbed TLS - CVE-2025-52497
Published: July 7, 2025
Vulnerability identifier: #VU112444
CSH Severity: Medium
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-52497
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when parsing invalid PEM-encrypted material in mbedtls_pk_parse_key(), mbedtls_pk_parse_keyfile() and mbedtls_pem_read_buffer() functions. A remote attacker can pass specially crafted data to the application, trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service attack.
Affected software
mbed TLS
Fedora
Ubuntu
PowerVM Hypervisor
mbedtls (Ubuntu package)
mbedtls
Fedora
Ubuntu
PowerVM Hypervisor
mbedtls (Ubuntu package)
mbedtls
How to mitigate CVE-2025-52497
Install updates from vendor's website.
mbed TLS - update to 3.6.4
PowerVM Hypervisor - addressed in versions FW1060.52, FW1110.10
mbedtls (Ubuntu package) - addressed in versions 2.8.0-1ubuntu0.1~esm1, 2.16.4-1ubuntu2+esm1, 2.28.0-1ubuntu0.1~esm1, 2.28.8-1ubuntu0.1~esm1
mbedtls - addressed in versions 3.6.4-1.fc42, 3.6.4-2.el10_0, 3.6.4-2.el10_1
PowerVM Hypervisor - addressed in versions FW1060.52, FW1110.10
mbedtls (Ubuntu package) - addressed in versions 2.8.0-1ubuntu0.1~esm1, 2.16.4-1ubuntu2+esm1, 2.28.0-1ubuntu0.1~esm1, 2.28.8-1ubuntu0.1~esm1
mbedtls - addressed in versions 3.6.4-1.fc42, 3.6.4-2.el10_0, 3.6.4-2.el10_1