CVE-2026-34874

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...

CVE-2026-34872

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 contributor...

CVE-2026-34871

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...

CVE-2025-66442

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...

CVE-2026-25833

Mbed TLS 3.5.0 to 3.6.5 fixed in 3.6.6 and 4.1.0 has a buffer overflow in the x509inetptonipv6 function...

CVE-2026-25834

Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade...

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-2026-25833

Mbed TLS 3.5.0 to 3.6.5 fixed in 3.6.6 and 4.1.0 has a buffer overflow in the x509inetptonipv6 function...

CVE-2026-25834

Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade...

CVE-2026-34871

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...

CVE-2025-66442

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...

CVE-2026-34875

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...

CVE-2026-34873

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...

CVE-2026-34874

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...

CVE-2026-34875

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...

CVE-2026-34872

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 contributor...

Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : Mbed TLS vulnerabilities (USN-8123-1)

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8123-1 advisory. It was discovered that Mbed TLS incorrectly handled memory allocation failures. A remote attacker could possibly use...

USN-8123-1: Mbed TLS vulnerabilities

It was discovered that Mbed TLS incorrectly handled memory allocation failures. A remote attacker could possibly use this issue to crash the program. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. CVE-2021-44732 Jonathan Winzig discovered that Mbed TLS incorrectly handled crafted...

Security Bulletin: This Power System update is being released to address CVE-2025-52497

Summary When Linux Secure Boot is enabled, a malformed public key certificate in the grubdb or grubdbx can cause a DoS blocking Linux partition boot or make a limited amount of partition memory available. Vulnerability Details CVEID:CVE-2025-52497 DESCRIPTION: Mbed TLS before 3.6.4 has a PEM...

Security Bulletin: This Power System update is being released to address CVE-2025-49087

Summary Mbed-TLS is used by partition firmware for Linux secure boot. This update is being released to mitigate any potential impacts to Linux partitions with secure boot enabled. Vulnerability Details CVEID:CVE-2025-49087 DESCRIPTION: In Mbed TLS 3.6.1 through 3.6.3 before 3.6.4, a timing...