7.5

CVE-2026-1584: gnu gnutls NULL Pointer Dereference

CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2026-1584UBUNTU-CVE-2026-1584DEBIAN-CVE-2026-1584
Published 09-04-2026Last modified 01-09-2026
Open JSON

Vulnerability summary

CVE-2026-1584 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in gnu gnutls. EPSS estimates a 1.32% chance of exploitation in the next 30 days, higher than 70.4% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.32%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 1
OPENSUSE-SU-2026:10177-1RHSA-2026:7477

Timeline

  1. 09-04-2026
    PublishedVulnerability first disclosed.
  2. 01-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

1.32%

Chance of exploitation in the next 30 days

Percentile

70%

Versus all other CVEs

30-day change

0.00 pp

From 1.32% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.32%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Alpine1 product
  • gnutls< 3.8.12-r0
Debian1 product
  • gnutls28< 3.8.12-1
Gnu1 product
Redhat1 product
Ubuntu1 product
  • gnutls28All versions (No fix recorded)

5 vendors · 5 products

References

9 links