Vulnerabilities
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Vulnerabilities
CVE-2026-34876
An issue was discovered in Mbed TLS 3.x before 3.6.6. An out-of-bounds read vulnerability in mbedtls_ccm_finish() in library/ccm.c allows attackers to obtain adjacent CCM context data via invocation of the multipart CCM API with an oversized tag_len parameter. This is caused by missing validation of the tag_len parameter against the size of the internal 16-byte authentication buffer. The issue affects the public multipart CCM API in Mbed TLS 3.x, where mbedtls_ccm_finish() can be invoked directly by applications. In Mbed TLS 4.x versions prior to the fix, the same missing validation exists in the internal implementation; however, the function is not exposed as part of the public API. Exploitation requires application-level invocation of the multipart CCM API.
CVE-2026-34875
mbedtls: Mbed TLS and TF-PSA-Crypto: Arbitrary code execution due to buffer overflow in FFDH key export
CVE-2026-25835
Mbed TLS before 3.6.6 and TF-PSA-Crypto before 1.1.0 misuse seeds in a Pseudo-Random Number Generator (PRNG).
CVE-2025-66442
mbedtls: Mbed TLS and TF-PSA-Crypto: Information disclosure via compiler-induced timing side channel
CVE-2026-34872
mbedtls: Mbed TLS and TF-PSA-Crypto: Shared secret manipulation via improper FFDH input validation
