CVE-2026-1584

Published Apr 9, 2026

Last updated 9 days ago

CVSS high 7.5
Ubuntu
Port (443)
Tls

Overview

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.
Source
secalert@redhat.com
NVD status
Analyzed
Products
gnutls, hardened_images

Risk scores

CVSS 3.1

Type
Primary
Base score
7.5
Impact score
3.6
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity
HIGH

Weaknesses

secalert@redhat.com
CWE-476

Social media

Hype score
Not currently trending

  1. GNUTLS-SA-2026-02-09-1、CVE-2026-1584 Severity High; invalid pointer access GNUTLS-SA-2026-02-09-2、CVE-2025-14831 Severity Medium; denial of service The GnuTLS Transport Layer Security Library https://t.co/KkxVAntDe6

    @autumn_good_35

    10 Feb 2026

    128 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  2. GnuTLS 3.8.12 fixes 2 CVEs https://t.co/9rzV3GhTDn CVE-2026-1584: NULL pointer dereference in PSK binder verification (TLS 1.3 resumption attempt with an invalid PSK binder value in ClientHello could lead to DoS) CVE-2025-14831: Name constraint processing performance issue

    @oss_security

    10 Feb 2026

    663 Impressions

    2 Retweets

    5 Likes

    1 Bookmark

    1 Reply

    0 Quotes

Configurations

Related CVEs

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  4. Issue summary: Converting an excessively large OCTET STRING value to a hexadecimal string leads to a heap buffer overflow on 32 bit platforms. Impact summary: A heap buffer overflow may lead to a crash or possibly an attacker controlled code execution or other undefined behavior. If an attacker can supply a crafted X.509 certificate with an excessively large OCTET STRING value in extensions such as the Subject Key Identifier (SKID) or Authority Key Identifier (AKID) which are being converted to hex, the size of the buffer needed for the result is calculated as multiplication of the input length by 3. On 32 bit platforms, this multiplication may overflow resulting in the allocation of a smaller buffer and a heap buffer overflow. Applications and services that print or log contents of untrusted X.509 certificates are vulnerable to this issue. As the certificates would have to have sizes of over 1 Gigabyte, printing or logging such certificates is a fairly unlikely operation and only 32 bit platforms are affected, this issue was assigned Low severity. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.•CVE-2026-31789
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References

Sources include official advisories and independent security research.