SB2025070784 - Fedora 42 update for mbedtls
Published: July 7, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Race condition (CVE-ID: CVE-2025-52496)
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to a race condition on x86 and amd64 systems that have the AESNI instruction, as it can be used for AES encryption and decryption. A remote attacker can extract AES keys from multithreaded programs and use them to decrypt traffic.
2) Out-of-bounds read (CVE-ID: CVE-2025-52497)
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.
3) Out-of-bounds read (CVE-ID: CVE-2025-49601)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in mbedtls_lms_import_public_key(). A remote attacker can pass specially crafted LMS public key 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.
4) Unchecked Return Value (CVE-ID: CVE-2025-49600)
The vulnerability allows a remote attacker to bypass signature verification.
The vulnerability exists due to unchecked return value in mbedtls_lms_verify(). A remote attacker can bypass LMS signature verification process.
Remediation
Install update from vendor's website.