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
This vulnerability exists in gnutls as used in Red Hat Hardened Images. An attacker can trigger a NULL pointer dereference remotely without authentication by sending a malformed ClientHello message containing an invalid PSK binder during the TLS handshake. The flaw leads to a server crash causing a remote denial of service. Red Hat published a security advisory (RHSA-2026:7477) that provides updated RPM packages for gnutls and related components to fix this issue.
Potential Impact
The impact is a remote denial of service (DoS) condition on servers running vulnerable versions of gnutls within Red Hat Hardened Images. There is no confidentiality or integrity impact reported. The vulnerability can be exploited without authentication and requires only network access to the affected service.
Mitigation Recommendations
Red Hat has released updated RPM packages for gnutls and related components to fix this vulnerability. Users of Red Hat Hardened Images should apply the update as described in the Red Hat advisory RHSA-2026:7477 available at https://access.redhat.com/security/cve/CVE-2026-1584. Patch status is confirmed by the vendor advisory. No alternative mitigations or workarounds are 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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability exists in gnutls as used in Red Hat Hardened Images. An attacker can trigger a NULL pointer dereference remotely without authentication by sending a malformed ClientHello message containing an invalid PSK binder during the TLS handshake. The flaw leads to a server crash causing a remote denial of service. Red Hat published a security advisory (RHSA-2026:7477) that provides updated RPM packages for gnutls and related components to fix this issue.
Potential Impact
The impact is a remote denial of service (DoS) condition on servers running vulnerable versions of gnutls within Red Hat Hardened Images. There is no confidentiality or integrity impact reported. The vulnerability can be exploited without authentication and requires only network access to the affected service.
Mitigation Recommendations
Red Hat has released updated RPM packages for gnutls and related components to fix this vulnerability. Users of Red Hat Hardened Images should apply the update as described in the Red Hat advisory RHSA-2026:7477 available at https://access.redhat.com/security/cve/CVE-2026-1584. Patch status is confirmed by the vendor advisory. No alternative mitigations or workarounds are 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: 4/9/2026, 6:20:57 PM
Last enriched: 5/4/2026, 1:55:42 AM
Last updated: 5/24/2026, 11:00:32 PM
Views: 44
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