Vulnerability DatabaseCVE-2026-33845
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CVE-2026-33845
Published:April 30, 2026
Updated:May 18, 2026
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.
Affected Packages
https://github.com/gnutls/gnutls.git (GITHUB):
Affected version(s) >=3.6.12 <3.8.13
Fix Suggestion:
Update to version 3.8.13
Related Resources (3)
https://bugzilla.redhat.com/show_bug.cgi?id=2450624
https://access.redhat.com/security/cve/CVE-2026-33845
https://access.redhat.com/errata/RHSA-2026:13274
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Integer Underflow (Wrap or Wraparound)
CWE-191
EPSS
Base Score:
0.05