CVE-2026-1584: NULL Pointer Dereference in Red Hat Red Hat Hardened Images
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.
AI Analysis
Technical Summary
A NULL pointer dereference vulnerability exists in gnutls as used in Red Hat Hardened Images. An attacker can exploit this by sending a malformed ClientHello message containing an invalid PSK binder value during the TLS handshake. This leads to a server crash due to dereferencing a NULL pointer, causing a remote Denial of Service condition. The vulnerability is tracked as CVE-2026-1584 with a CVSS 3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Red Hat has issued updated gnutls RPMs (version 3.8.12-1.1.hum1) for multiple architectures to fix this issue.
Potential Impact
Successful exploitation results in a remote Denial of Service (DoS) by crashing the server during the TLS handshake. There is no impact on confidentiality or integrity, only availability is affected.
Mitigation Recommendations
Red Hat has released updated gnutls RPM packages (gnutls-3.8.12-1.1.hum1 and related packages) that fix this vulnerability. Users of Red Hat Hardened Images should apply these updates promptly. Patch status is confirmed by the Red Hat advisory. No other mitigation or workaround is indicated.
CVE-2026-1584: NULL Pointer Dereference in Red Hat Red Hat Hardened Images
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 v3.1
Score 7.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
A NULL pointer dereference vulnerability exists in gnutls as used in Red Hat Hardened Images. An attacker can exploit this by sending a malformed ClientHello message containing an invalid PSK binder value during the TLS handshake. This leads to a server crash due to dereferencing a NULL pointer, causing a remote Denial of Service condition. The vulnerability is tracked as CVE-2026-1584 with a CVSS 3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Red Hat has issued updated gnutls RPMs (version 3.8.12-1.1.hum1) for multiple architectures to fix this issue.
Potential Impact
Successful exploitation results in a remote Denial of Service (DoS) by crashing the server during the TLS handshake. There is no impact on confidentiality or integrity, only availability is affected.
Mitigation Recommendations
Red Hat has released updated gnutls RPM packages (gnutls-3.8.12-1.1.hum1 and related packages) that fix this vulnerability. Users of Red Hat Hardened Images should apply these updates promptly. Patch status is confirmed by the Red Hat advisory. No other mitigation or workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-01-29T02:59:06.727Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-1584","vendor":"Red Hat"}]
Threat ID: 69d7ee091cc7ad14da04a8bf
Added to database: 04/09/2026, 18:20:57 UTC
Last enriched: 07/15/2026, 08:29:32 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 98
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