mbedtls: Mbed TLS before 2.28.10 and 3.x before 3.6.3, in some cases of failed memory allocation or hardware errors, uses unin...
CVE-2025-27810 is fixed in 13 products on 1 platform, first by DEBIAN-CVE-2025-27810, released March 25, 2025. It is not reported as exploited. Patch Radar priority: Routine.
Mbed TLS before 2.28.10 and 3.x before 3.6.3, in some cases of failed memory allocation or hardware errors, uses uninitialized stack memory to compose the TLS Finished message, potentially leading to authentication bypasses such as replays.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libmbedcrypto1 · Ubuntu 18.04.6 LTS (bionic) | 2.8.0-1ubuntu0.1~esm1 | libmbedcrypto1 2.8.0-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedcrypto3 · Ubuntu 20.04 LTS (focal) | 2.16.4-1ubuntu2+esm1 | libmbedcrypto3 2.16.4-1ubuntu2+esm1 | Jul 20, 2025 |
| libmbedcrypto7 · Ubuntu 22.04.1 LTS (jammy) | 2.28.0-1ubuntu0.1~esm1 | libmbedcrypto7 2.28.0-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedcrypto7t64 · Ubuntu 24.04.5 LTS (noble) | 2.28.8-1ubuntu0.1~esm1 | libmbedcrypto7t64 2.28.8-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedtls10 · Ubuntu 18.04.6 LTS (bionic) | 2.8.0-1ubuntu0.1~esm1 | libmbedtls10 2.8.0-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedtls12 · Ubuntu 20.04 LTS (focal) | 2.16.4-1ubuntu2+esm1 | libmbedtls12 2.16.4-1ubuntu2+esm1 | Jul 20, 2025 |
| libmbedtls14 · Ubuntu 22.04.1 LTS (jammy) | 2.28.0-1ubuntu0.1~esm1 | libmbedtls14 2.28.0-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedtls14t64 · Ubuntu 24.04.5 LTS (noble) | 2.28.8-1ubuntu0.1~esm1 | libmbedtls14t64 2.28.8-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedx509-0 · Ubuntu 18.04.6 LTS (bionic) | 2.8.0-1ubuntu0.1~esm1 | libmbedx509-0 2.8.0-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedx509-0 · Ubuntu 20.04 LTS (focal) | 2.16.4-1ubuntu2+esm1 | libmbedx509-0 2.16.4-1ubuntu2+esm1 | Jul 20, 2025 |
| libmbedx509-1 · Ubuntu 22.04.1 LTS (jammy) | 2.28.0-1ubuntu0.1~esm1 | libmbedx509-1 2.28.0-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedx509-1t64 · Ubuntu 24.04.5 LTS (noble) | 2.28.8-1ubuntu0.1~esm1 | libmbedx509-1t64 2.28.8-1ubuntu0.1~esm1 | Jul 20, 2025 |
| mbedtls · Debian 13.5 (trixie) | 3.6.3-1 | DEBIAN-CVE-2025-27810 | Mar 25, 2025 |
| mbedtls · Debian 14 | 3.6.3-1 | DEBIAN-CVE-2025-27810 | Mar 25, 2025 |
| mbedtls · opensuse-leap 16.0 | 3.6.6-bp160.1.1 | OPENSUSE-SU-2026:21144-1 | Jun 22, 2026 |
| mbedtls-2 · opensuse-leap 16.0 | 2.28.10-bp160.1.1 | OPENSUSE-SU-2026:21145-1 | Jun 22, 2026 |
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