Vulnerability in Red Hat Discovery 2
CVE-2026-5260
A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.
EPSS exploit prediction
EPSS: 0.009 (60.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.009 · change: +0.002
Affected products
- 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
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support — versions 0:3.6.16-5.el8_6.5, 0:4.13-3.el8_6.2
- Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On — versions 0:3.6.16-5.el8_6.5, 0:4.13-3.el8_6.2
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-5260 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- access.redhat.com/errata/RHSA-2026:20611 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:20613 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:20612 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:26319 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:26409 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:29197 (vendor-advisory)
- www.gnutls.org/security-new.html
- access.redhat.com/errata/RHSA-2026:30004 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-5260?
- CVE-2026-5260 is a high-severity vulnerability in Red Hat Discovery 2, classified under Buffer Over-read. CVSS score: 8.2/10. Published 2026-05-26.
- How severe is CVE-2026-5260?
- High severity. CVSS v3 base score is 8.2 out of 10.