Description
An issue was discovered in Mbed TLS before 2.28.9 and 3.x before 3.6.1, in which the user-selected algorithm is not used. Unlike previously documented, enabling MBEDTLS_PSA_HMAC_DRBG_MD_TYPE does not cause the PSA subsystem to use HMAC_DRBG: it uses HMAC_DRBG only when MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG and MBEDTLS_CTR_DRBG_C are disabled.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mbedtls | 3.6.2-1 | — |
| Debian 13 | mbedtls | 3.6.2-1 | — |
| Debian 12 | mbedtls | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | mbedtls | No fix yet | — |
| Ubuntu Pro 22.04 LTS | mbedtls | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | mbedtls-2 | 2.28.9-1.1 | openSUSE-SU-2024:14304-1 |
| openSUSE Leap 16.0 | mbedtls-2 | 2.28.10-bp160.1.1 | openSUSE-SU-2026:21145-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | mbedtls +1 | 3.6.1-r0 | — |
| Alpine v3.24 | mbedtls2 | 2.28.10-r0 | — |
| Alpine v3.23 | mbedtls | 3.6.1-r0 | — |
| Alpine v3.23 | mbedtls2 | 2.28.10-r0 | — |
| Alpine v3.22 | mbedtls | 3.6.1-r0 | — |
| Alpine v3.22 | mbedtls2 | 2.28.10-r0 | — |
| Alpine v3.21 | mbedtls | 3.6.1-r0 | — |
| Alpine v3.21 | mbedtls2 | 2.28.10-r0 | — |
| Alpine v3.20 | mbedtls | 3.6.1-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | mbedtls | 2.28.9-r0 | — |
| Alpine v3.18 | mbedtls | 2.28.9-r0 | — |
| Alpine v3.17 | mbedtls | 2.28.9-r0 | — |
Advisories 2
- openSUSE-SU-2026:21145-1 Security update for mbedtls-2 SUSE / openSUSE Security Updates · Jun 30, 2026
- openSUSE-SU-2024:14304-1 libmbedcrypto7-2.28.9-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026