How severe is CVE-2026-1584?

CVE-2026-1584 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-1584 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-1584?

CVE-2026-1584 primarily affects Redhat Hardened Images. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-1584?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-1584 have an EU (EUVD) identifier?

Yes. CVE-2026-1584 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20986.

When was CVE-2026-1584 published?

CVE-2026-1584 was published on 2026-04-09 and last updated on 2026-06-30.

CVE-2026-1584

CVE-2026-1584 is a high-severity vulnerability in Redhat Hardened Images with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20986
Weakness: CWE-476
Affected product: Redhat Hardened Images
Published: 2026-04-09
Last modified: 2026-06-30

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.

Frequently asked questions

What is CVE-2026-1584?: 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.
How severe is CVE-2026-1584?: CVE-2026-1584 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-1584 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-1584?: CVE-2026-1584 primarily affects Redhat Hardened Images. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-1584?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-1584 have an EU (EUVD) identifier?: Yes. CVE-2026-1584 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20986.
When was CVE-2026-1584 published?: CVE-2026-1584 was published on 2026-04-09 and last updated on 2026-06-30.

References

Affected products (2)

cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*

More vulnerabilities in Redhat Hardened Images

CVE-2026-0966 — High (CVSS 8.2): A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing…
CVE-2026-48864 — High (CVSS 7.8): A flaw was found in libsolv. This heap buffer overflow occurs during the decompression of attacker-controlled…
CVE-2026-6846 — High (CVSS 7.8): A flaw was found in binutils. A heap-buffer-overflow vulnerability exists when processing a specially crafted XCOFF…
CVE-2025-14821 — High (CVSS 7.8): A flaw was found in libssh. This vulnerability allows local man-in-the-middle attacks, security downgrades of SSH…
CVE-2026-4775 — High (CVSS 7.8): A flaw was found in the libtiff library. A remote attacker could exploit a signed integer overflow vulnerability in the…
CVE-2026-42009 — High (CVSS 7.5): A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS)…

All CVEs affecting Redhat Hardened Images →

Other CWE-476 (NULL Pointer Dereference) vulnerabilities

CVE-2022-36648 — Critical (CVSS 10.0): The hardware emulation in the of_dpa_cmd_add_l2_flood of rocker device model in QEMU, as used in 7.0.0 and earlier,…
CVE-2020-14500 — Critical (CVSS 10.0): Secomea GateManager all versions prior to 9.2c, An attacker can send a negative value and overwrite arbitrary data.
CVE-2010-2495 — Critical (CVSS 10.0): The pppol2tp_xmit function in drivers/net/pppol2tp.c in the L2TP implementation in the Linux kernel before 2.6.34 does…
CVE-2026-46195 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: smb: client: validate dacloffset before building…
CVE-2026-31657 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: batman-adv: hold claim backbone gateways by…
CVE-2026-31436 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix possible wrong descriptor…

Browse all CWE-476 (NULL Pointer Dereference) vulnerabilities →