CVE-2026-35387
Publication date 2 April 2026
Last updated 22 September 2026
Ubuntu priority
Description
OpenSSH before 10.3 can use unintended ECDSA algorithms. Listing of any ECDSA algorithm in PubkeyAcceptedAlgorithms or HostbasedAcceptedAlgorithms is misinterpreted to mean all ECDSA algorithms.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| openssh | 26.04 LTS resolute |
Fixed 1:10.2p1-2ubuntu3.2
|
| 24.04 LTS noble |
Fixed 1:9.6p1-3ubuntu13.16
|
|
| 22.04 LTS jammy |
Fixed 1:8.9p1-3ubuntu0.15
|
|
| 20.04 LTS focal |
Fixed 1:8.2p1-4ubuntu0.13+esm3
|
|
| 18.04 LTS bionic |
Fixed 1:7.6p1-4ubuntu0.7+esm6
|
|
| 16.04 LTS xenial |
Fixed 1:7.2p2-4ubuntu2.10+esm10
|
|
| 14.04 LTS trusty |
Fixed 1:6.6p1-2ubuntu2.13+esm4
|
|
| openssh-ssh1 | 26.04 LTS resolute | Ignored |
| 24.04 LTS noble | Ignored | |
| 22.04 LTS jammy | Ignored | |
| 20.04 LTS focal | Ignored | |
| 18.04 LTS bionic | Ignored |
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mdeslaur
openssh-ssh1 is only provided for compatibility with old devices that cannot be upgraded to modern protocols. We will not be providing any security support for the openssh-ssh1 package as it is insecure and should be used in trusted environments only.
Severity score breakdown
CVSS version: CVSS v3.0
Base score
3.1 · Low
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
References
Related Ubuntu Security Notices (USN)
- USN-8222-1
- OpenSSH vulnerabilities
- 29 April 2026
- USN-8804-1
- OpenSSH vulnerabilities
- 22 September 2026