CVE-2026-1584
Medium
Elevated severity or exploit probability.
CVSS base
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS — probability of exploitation (30 days)
1.3%
69.6th percentile
CISA KEV
Not listed
Weakness / dates
CWE-476
Published 2026-04-09 · modified 2026-09-01
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | N | None |
| Integrity | N | None |
| Availability | H | High |
Timeline
- 2026-04-09 — Published (NVD)
- 2026-09-01 — Last modified (NVD)
Description
A flaw was found in gnutls. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted ClientHello message with an invalid Pre-Shared Key (PSK) binder value during the TLS handshake. This can lead to a NULL pointer dereference, causing the server to crash and resulting in a remote Denial of Service (DoS) condition.
Affected
References
- https://access.redhat.com/errata/RHSA-2026:7477
- https://access.redhat.com/security/cve/CVE-2026-1584
- https://bugzilla.redhat.com/show_bug.cgi?id=2435258
- https://access.redhat.com/errata/RHSA-2026:7477
- https://access.redhat.com/security/cve/CVE-2026-1584
- https://bugzilla.redhat.com/show_bug.cgi?id=2435258
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1584.json