What is CVE-2026-42010?

CVE-2026-42010 is a high-severity vulnerability in Gnu Gnutls, classified under Improper Null Termination. CVSS score: 7.1/10. Published 2026-05-07.

How severe is CVE-2026-42010?

High severity. CVSS v3 base score is 7.1 out of 10.

Vulnerability in Gnu Gnutls

CVE-2026-42010

A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specia…

EPSS: 0.011 (60.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N.

Affected products

Gnu Gnutls
Red Hat Ai Inference Server 3.2 — versions 1782951051, 1782951244, 1782951012
Red Hat Discovery 2 — versions 1782159791, 1782166952
Red Hat Enterprise Linux 10 — versions 0:3.8.10-4.el10_2
Red Hat Enterprise Linux 10.0 Extended Update Support — versions 0:3.8.9-9.el10_0.19
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8 — versions 0:3.6.16-8.el8_10.6
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support — versions 0:3.6.14-10.el8_4.1, 0:4.13-3.el8_4.1
Red Hat Enterprise Linux 8.4 Extended Update Support Long-life Add-on — versions 0:3.6.14-10.el8_4.1, 0:4.13-3.el8_4.1

Weakness classification (CWE)

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry, Vendor Advisory)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Issue Tracking, Vendor Advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com

Frequently asked questions

What is CVE-2026-42010?: CVE-2026-42010 is a high-severity vulnerability in Gnu Gnutls, classified under Improper Null Termination. CVSS score: 7.1/10. Published 2026-05-07.
How severe is CVE-2026-42010?: High severity. CVSS v3 base score is 7.1 out of 10.