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CVE-2026-33845 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.1 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CNA: redhat-SADPCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:13274 redhat-SADPVendor Advisory
https://access.redhat.com/errata/RHSA-2026:20611 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:20612 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:20613 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:26319 redhat-SADP

see all 57 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-191Integer Underflow (Wrap or Wraparound)redhat-SADP
CWE-191Integer Underflow (Wrap or Wraparound)[email protected]

Affected Products

ProductVersions
gnu gnutls
All versions

CPE

  • cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
redhat openshift container platform
4.0

CPE

  • cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
redhat enterprise linux
6.0
7.0
8.0
9.0
10.0

CPE

  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

45 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-33845
NVD Published Date:
Apr 30, 2026
NVD Last Modified:
Sep 18, 2026
Source:
[email protected]
CVE-2026-33845 Details - Not Deferred