CVE-2026-5260
HIGHGnutls: gnutls: information disclosure via heap overread in rsa key exchange
Title source: cnaDescription
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.
References (5)
Core 5
Core References
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:20612
https://access.redhat.com/errata/RHSA-2026:20612
Vendor Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2026:20613
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:20611
https://access.redhat.com/errata/RHSA-2026:20611
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-5260
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2467450
https://bugzilla.redhat.com/show_bug.cgi?id=2467450
Scores
CVSS v3
8.2
EPSS
0.0071
EPSS Percentile
48.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-1284
Status
published
Products (10)
Red Hat/Red Hat Enterprise Linux 10
Red Hat/Red Hat Enterprise Linux 10
0:3.8.10-4.el10_2
Red Hat/Red Hat Enterprise Linux 6
Red Hat/Red Hat Enterprise Linux 7
Red Hat/Red Hat Enterprise Linux 8
Red Hat/Red Hat Enterprise Linux 8
0:3.6.16-8.el8_10.6
Red Hat/Red Hat Enterprise Linux 9
Red Hat/Red Hat Enterprise Linux 9
0:3.8.10-4.el9_8
Red Hat/Red Hat Hardened Images
Red Hat/Red Hat OpenShift Container Platform 4
Published
May 26, 2026
Tracked Since
May 27, 2026