CVE-2026-1584
Publication date 10 February 2026
Last updated 10 April 2026
Ubuntu priority
Description
A TLS 1.3 resumption attempt with an invalid PSK binder value in ClientHello could lead to a denial of service attack via crashing the server.
Read the notes from the security team
Why is this CVE high priority?
A remote attacker can reliably cause a denial of service by sending malformed requests.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| gnutls28 | 25.10 questing |
Not affected
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Not affected
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
Notes
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |