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CVE-2026-1584

Gnutls: gnutls: remote denial of service via crafted clienthello with invalid psk binder

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.37%Up 1.3 points since Apr 10, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.5

Gnutls: gnutls: remote denial of service via crafted clienthello with invalid psk binder

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.

Record
CVE-2026-1584
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476, CWE-476
Updated
2026-11-04
EUVDEUVD-2026-20986 7.5

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.

Record
EUVD-2026-20986
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-04
GitHub AdvisoriesGHSA-92xv-mw29-x4px 7.5

A flaw was found in gnutls. A remote, unauthenticated attacker can exploit this vulnerability by...

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.

Record
GHSA-92xv-mw29-x4px
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
NVD 7.5

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.

Record
CVE-2026-1584
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-04
OSVALPINE-CVE-2026-1584 7.5

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.

Record
ALPINE-CVE-2026-1584
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVBELL-CVE-2026-1584 7.5
Record
BELL-CVE-2026-1584
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 5 moreShow less
OSV 7.5

Gnutls: gnutls: remote denial of service via crafted clienthello with invalid psk binder

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.

Record
CVE-2026-1584
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-05
OSVDEBIAN-CVE-2026-1584 7.5

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.

Record
DEBIAN-CVE-2026-1584
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-05
OSVRHSA-2026:7477 7.5

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:7477
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2026:10177-1 No score

gnutls-3.8.12-1.1 on GA media

These are all security issues fixed in the gnutls-3.8.12-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:10177-1
Updated
2026-11-02
OSVUBUNTU-CVE-2026-1584 No score

[Unknown description]

Record
UBUNTU-CVE-2026-1584
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
gnutls
Alpine:v3.20
 before 3.8.12-r0
3.8.12-r0
gnutls
Alpine:v3.21
 before 3.8.12-r0
3.8.12-r0
gnutls
Alpine:v3.22
 before 3.8.12-r0
3.8.12-r0
gnutls
Alpine:v3.23
 before 3.8.12-r0
3.8.12-r0
gnutls
Alpine:v3.24
 before 3.8.12-r0
3.8.12-r0
gnutls
Alpaquita:23
 3.7.8-r2 up to 3.8.13-r0
3.8.13-r0
gnutls
Alpaquita:25
 3.8.8-r0 up to 3.8.12-r0
3.8.12-r0
gnutls
Alpaquita:stream
 3.8.0-r3 up to 3.8.12-r0
3.8.12-r0
gnutls28
Debian:14
 before 3.8.12-1, plus listed versions
3.8.10-13.8.10-23.8.10-33.8.11-13.8.11-23.8.11-33.8.9-3
3.8.12-1
gnutls
Red Hat:hummingbird:1
From an advisory covering 6 CVEs
 before 0:3.8.12-1.1.hum1
0:3.8.12-1.1.hum1
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Affected packages
PackageAffectedFixed
gnutls-c++
Red Hat:hummingbird:1
From an advisory covering 6 CVEs
 before 0:3.8.12-1.1.hum1
0:3.8.12-1.1.hum1
gnutls-dane
Red Hat:hummingbird:1
From an advisory covering 6 CVEs
 before 0:3.8.12-1.1.hum1
0:3.8.12-1.1.hum1
gnutls-devel
Red Hat:hummingbird:1
From an advisory covering 6 CVEs
 before 0:3.8.12-1.1.hum1
0:3.8.12-1.1.hum1
gnutls-fips
Red Hat:hummingbird:1
From an advisory covering 6 CVEs
 before 0:3.8.12-1.1.hum1
0:3.8.12-1.1.hum1
gnutls-utils
Red Hat:hummingbird:1
From an advisory covering 6 CVEs
 before 0:3.8.12-1.1.hum1
0:3.8.12-1.1.hum1
mingw32-gnutls
Red Hat:hummingbird:1
From an advisory covering 6 CVEs
 before 0:3.8.12-1.1.hum1
0:3.8.12-1.1.hum1
mingw64-gnutls
Red Hat:hummingbird:1
From an advisory covering 6 CVEs
 before 0:3.8.12-1.1.hum1
0:3.8.12-1.1.hum1
gnutls
openSUSE:Tumbleweed
From an advisory covering 2 CVEs
 before 3.8.12-1.1
3.8.12-1.1

History

History
RecordedChangedSources
affectedEUVD, NVD, OSV
factsCVE List
affected
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-1584 is a high vulnerability (CVSS 7.5) in Gnu Gnutls, published February 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.37%, the 72nd percentile. Fixed in gnutls 3.8.12-r0.

References

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