Description
Mbed TLS through 3.6.4 has an Observable Timing Discrepancy.
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 | 3.6.5-0.1 | — |
| Debian 13 | mbedtls | 3.6.5-0.1~deb13u1 | — |
| Debian 12 | mbedtls | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | mbedtls | No fix yet | — |
| Ubuntu 24.04 LTS | mbedtls | No fix yet | — |
| Ubuntu 22.04 LTS | mbedtls | No fix yet | — |
| Ubuntu 16.04 LTS | mbedtls | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | mbedtls | No fix yet | — |
| Ubuntu Pro 18.04 LTS | mbedtls | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | ovmf | 202408-150700.3.15.1 | SUSE-SU-2026:1413-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | ovmf | 202502-160000.4.1 | SUSE-SU-2026:21161-1 |
| SLES 16.0 | ovmf | 202502-160000.4.1 | SUSE-SU-2026:21161-1 |
| SLE Micro 6.2 | ovmf | 202502-160000.4.1 | SUSE-SU-2026:21018-1 |
| SLE Micro 6.1 | ovmf | 202402-slfo.1.1_2.1 | SUSE-SU-2026:20769-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | mbedtls | 3.6.5-1.1 | openSUSE-SU-2025:15747-1 |
| openSUSE Tumbleweed | mbedtls-2 | 2.28.10-5.1 | openSUSE-SU-2026:11790-1 |
| openSUSE Tumbleweed | micropython | 1.26.0-2.1 | openSUSE-SU-2025:15662-1 |
| openSUSE Tumbleweed | ovmf | 202602-5.1 | openSUSE-SU-2026:10378-1 |
| openSUSE Tumbleweed | vlang | 0.5-2.1 | openSUSE-SU-2026:10083-1 |
| openSUSE Leap 16.0 | mbedtls | 3.6.6-bp160.1.1 | openSUSE-SU-2026:21144-1 |
| openSUSE Leap 16.0 | mbedtls-2 | 2.28.10-bp160.2.1 | openSUSE-SU-2026:21864-1 |
| openSUSE Leap 16.0 | micropython | 1.26.0-bp160.1.1 | openSUSE-SU-2025:20035-1 |
| openSUSE Leap 16.0 | ovmf | 202502-160000.4.1 | openSUSE-SU-2026:20499-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | mbedtls +1 | 3.6.5-r0 | — |
| Alpine v3.23 | mbedtls | 3.6.5-r0 | — |
| Alpine v3.22 | mbedtls | 3.6.5-r0 | — |
| Alpine v3.21 | mbedtls | 3.6.5-r0 | — |
| Alpine v3.20 | mbedtls | 3.6.5-r0 | — |
Advisories 13
- openSUSE-SU-2026:21864-1 Security update for mbedtls-2 SUSE / openSUSE Security Updates · Sep 17, 2026
- openSUSE-SU-2026:11790-1 libmbedcrypto7-2.28.10-5.1 on GA media SUSE / openSUSE Security Updates · Sep 16, 2026
- openSUSE-SU-2026:21144-1 Security update for mbedtls SUSE / openSUSE Security Updates · Jun 30, 2026
- openSUSE-SU-2026:20499-1 Security update for ovmf SUSE / openSUSE Security Updates · Apr 22, 2026
- SUSE-SU-2026:21161-1 Security update for ovmf SUSE / openSUSE Security Updates · Apr 22, 2026
- SUSE-SU-2026:1413-1 Security update for ovmf SUSE / openSUSE Security Updates · Apr 17, 2026
- SUSE-SU-2026:21018-1 Security update for ovmf SUSE / openSUSE Security Updates · Apr 14, 2026
- SUSE-SU-2026:20769-1 Security update for ovmf SUSE / openSUSE Security Updates · Mar 25, 2026
- openSUSE-SU-2026:10083-1 vlang-0.5-2.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:20035-1 Security update for micropython SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15747-1 libeverest-3.6.5-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15662-1 micropython-1.26.0-2.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10378-1 ovmf-202602-5.1 on GA media SUSE / openSUSE Security Updates · Mar 18, 2026