CVE-2026-33845
HIGHGnutls: gnutls: denial of service via dtls zero-length fragment
Title source: cnaDescription
A flaw in GnuTLS DTLS handshake parsing allows malformed fragments with zero length and non-zero offset, leading to an integer underflow during reassembly and resulting in an out-of-bounds read. This issue is remotely exploitable and may cause information disclosure or denial of service.
References (6)
Core 6
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-2026:13274
https://access.redhat.com/errata/RHSA-2026:13274
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-33845
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2450624
https://bugzilla.redhat.com/show_bug.cgi?id=2450624
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:20611
https://access.redhat.com/errata/RHSA-2026:20611
Scores
CVSS v3
7.5
EPSS
0.0064
EPSS Percentile
45.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-191
Status
published
Products (18)
gnu/gnutls
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
... and 8 more
Published
Apr 30, 2026
Tracked Since
Apr 30, 2026