CVE-2026-25834
mbedtls: Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.
CVE-2026-25834 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-25834, released April 1, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
6.5
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0014
3rd percentile
Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| mbedtls · Debian 13.5 (trixie) | 3.6.6-0.1~deb13u1 | DEBIAN-CVE-2026-25834 | Apr 1, 2026 |
| mbedtls · Debian 14 | 3.6.6-0.1 | DEBIAN-CVE-2026-25834 | Apr 1, 2026 |
| mbedtls · opensuse-leap 16.0 | 3.6.6-bp160.1.1 | OPENSUSE-SU-2026:21144-1 | Jun 22, 2026 |
| ovmf · sles 16.0 | 202502-160000.5.1 | SUSE-SU-2026:22016-1 | Jun 2, 2026 |
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