https://patchthecve.com/CVEs with upgrade or downgrade fix stepshttps://patchthecve.com/cve/CVE-2026-34877.htmlhttps://patchthecve.com/cve/CVE-2026-34877.htmlFri, 24 Jul 2026 21:10:00 +0000CRITICAL 9.8: An issue was discovered in Mbed TLS versions from 2.19.0 up to 3.6.5, Mbed TLS 4.0.0. Insufficient protection of serialized SSL context or session structures allows an attacker who can modify the serialized structures to induce memory corruption, leading to arbitrary code execution. This is caused bhttps://patchthecve.com/cve/CVE-2026-34876.htmlhttps://patchthecve.com/cve/CVE-2026-34876.htmlFri, 24 Jul 2026 21:10:00 +0000HIGH 7.5: 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 ofhttps://patchthecve.com/cve/CVE-2026-34873.htmlhttps://patchthecve.com/cve/CVE-2026-34873.htmlWed, 17 Jun 2026 10:39:46 +0000CRITICAL 9.1: An issue was discovered in Mbed TLS 3.5.0 through 4.0.0. Client impersonation can occur while resuming a TLS 1.3 session.https://patchthecve.com/cve/CVE-2026-34872.htmlhttps://patchthecve.com/cve/CVE-2026-34872.htmlWed, 17 Jun 2026 10:39:46 +0000CRITICAL 9.1: An issue was discovered in Mbed TLS 3.5.x and 3.6.x through 3.6.5 and TF-PSA-Crypto 1.0. There is a lack of contributory behavior in FFDH due to improper input validation. Using finite-field Diffie-Hellman, the other party can force the shared secret into a small set of values (lack of contributory https://patchthecve.com/cve/CVE-2025-66442.htmlhttps://patchthecve.com/cve/CVE-2025-66442.htmlWed, 17 Jun 2026 09:56:51 +0000MEDIUM 5.1: In Mbed TLS through 4.0.0, there is a compiler-induced timing side channel (in RSA and CBC/ECB decryption) that only occurs with LLVM's select-optimize feature. TF-PSA-Crypto through 1.0.0 is also affected.https://patchthecve.com/cve/CVE-2026-34874.htmlhttps://patchthecve.com/cve/CVE-2026-34874.htmlWed, 17 Jun 2026 10:39:46 +0000HIGH 7.5: An issue was discovered in Mbed TLS through 3.6.5 and 4.x through 4.0.0. There is a NULL pointer dereference in distinguished name parsing that allows an attacker to write to address 0.https://patchthecve.com/cve/CVE-2026-34871.htmlhttps://patchthecve.com/cve/CVE-2026-34871.htmlWed, 17 Jun 2026 10:39:45 +0000MEDIUM 6.7: An issue was discovered in Mbed TLS before 3.6.6 and 4.x before 4.1.0 and TF-PSA-Crypto before 1.1.0. There is a Predictable Seed in a Pseudo-Random Number Generator (PRNG).https://patchthecve.com/cve/CVE-2026-25835.htmlhttps://patchthecve.com/cve/CVE-2026-25835.htmlWed, 17 Jun 2026 10:25:18 +0000HIGH 7.7: Mbed TLS before 3.6.6 and TF-PSA-Crypto before 1.1.0 misuse seeds in a Pseudo-Random Number Generator (PRNG).https://patchthecve.com/cve/CVE-2026-25833.htmlhttps://patchthecve.com/cve/CVE-2026-25833.htmlWed, 17 Jun 2026 10:25:18 +0000HIGH 7.5: Mbed TLS 3.5.0 to 3.6.5 fixed in 3.6.6 and 4.1.0 has a buffer overflow in the x509_inet_pton_ipv6() functionhttps://patchthecve.com/cve/CVE-2026-34875.htmlhttps://patchthecve.com/cve/CVE-2026-34875.htmlWed, 17 Jun 2026 10:39:46 +0000CRITICAL 9.8: An issue was discovered in Mbed TLS through 3.6.5 and TF-PSA-Crypto 1.0.0. A buffer overflow can occur in public key export for FFDH keys.https://patchthecve.com/cve/CVE-2026-25834.htmlhttps://patchthecve.com/cve/CVE-2026-25834.htmlWed, 17 Jun 2026 10:25:18 +0000MEDIUM 6.5: Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.