CVE-2026-33845

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
Link Resource
https://access.redhat.com/errata/RHSA-2026:13274 Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:20611
https://access.redhat.com/errata/RHSA-2026:20612
https://access.redhat.com/errata/RHSA-2026:20613
https://access.redhat.com/errata/RHSA-2026:26319
https://access.redhat.com/errata/RHSA-2026:26409
https://access.redhat.com/errata/RHSA-2026:29197
https://access.redhat.com/errata/RHSA-2026:30004
https://access.redhat.com/errata/RHSA-2026:30849
https://access.redhat.com/errata/RHSA-2026:30850
https://access.redhat.com/errata/RHSA-2026:32962
https://access.redhat.com/errata/RHSA-2026:33125
https://access.redhat.com/errata/RHSA-2026:34372
https://access.redhat.com/errata/RHSA-2026:36004
https://access.redhat.com/errata/RHSA-2026:36005
https://access.redhat.com/errata/RHSA-2026:36006
https://access.redhat.com/errata/RHSA-2026:41921
https://access.redhat.com/security/cve/CVE-2026-33845 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2450624 Issue Tracking Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:13274 Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:20611
https://access.redhat.com/errata/RHSA-2026:20612
https://access.redhat.com/errata/RHSA-2026:20613
https://access.redhat.com/errata/RHSA-2026:26319
https://access.redhat.com/errata/RHSA-2026:26409
https://access.redhat.com/errata/RHSA-2026:29197
https://access.redhat.com/errata/RHSA-2026:30004
https://access.redhat.com/errata/RHSA-2026:30849
https://access.redhat.com/errata/RHSA-2026:30850
https://access.redhat.com/errata/RHSA-2026:32962
https://access.redhat.com/errata/RHSA-2026:33125
https://access.redhat.com/errata/RHSA-2026:34372
https://access.redhat.com/errata/RHSA-2026:36004
https://access.redhat.com/errata/RHSA-2026:36005
https://access.redhat.com/errata/RHSA-2026:36006
https://access.redhat.com/errata/RHSA-2026:41921
https://access.redhat.com/security/cve/CVE-2026-33845 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2450624 Issue Tracking Vendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33845.json
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*

History

20 Jul 2026, 12:18

Type Values Removed Values Added
References () https://access.redhat.com/errata/RHSA-2026:41921 - () https://access.redhat.com/errata/RHSA-2026:41921 -

20 Jul 2026, 10:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:41921 -

07 Jul 2026, 12:16

Type Values Removed Values Added
References () https://access.redhat.com/errata/RHSA-2026:36004 - () https://access.redhat.com/errata/RHSA-2026:36004 -
References () https://access.redhat.com/errata/RHSA-2026:36005 - () https://access.redhat.com/errata/RHSA-2026:36005 -
References () https://access.redhat.com/errata/RHSA-2026:36006 - () https://access.redhat.com/errata/RHSA-2026:36006 -

06 Jul 2026, 20:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:36005 -

06 Jul 2026, 18:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:36004 -
  • () https://access.redhat.com/errata/RHSA-2026:36006 -

02 Jul 2026, 12:17

Type Values Removed Values Added
References () https://access.redhat.com/errata/RHSA-2026:34372 - () https://access.redhat.com/errata/RHSA-2026:34372 -

01 Jul 2026, 20:17

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:34372 -

30 Jun 2026, 03:18

Type Values Removed Values Added
References
  • () https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33845.json -
References () https://access.redhat.com/errata/RHSA-2026:13274 - Vendor Advisory () https://access.redhat.com/errata/RHSA-2026:13274 - Vendor Advisory
References () https://access.redhat.com/errata/RHSA-2026:20611 - () https://access.redhat.com/errata/RHSA-2026:20611 -
References () https://access.redhat.com/errata/RHSA-2026:20612 - () https://access.redhat.com/errata/RHSA-2026:20612 -
References () https://access.redhat.com/errata/RHSA-2026:20613 - () https://access.redhat.com/errata/RHSA-2026:20613 -
References () https://access.redhat.com/errata/RHSA-2026:26319 - () https://access.redhat.com/errata/RHSA-2026:26319 -
References () https://access.redhat.com/errata/RHSA-2026:26409 - () https://access.redhat.com/errata/RHSA-2026:26409 -
References () https://access.redhat.com/errata/RHSA-2026:29197 - () https://access.redhat.com/errata/RHSA-2026:29197 -
References () https://access.redhat.com/errata/RHSA-2026:30004 - () https://access.redhat.com/errata/RHSA-2026:30004 -
References () https://access.redhat.com/errata/RHSA-2026:30849 - () https://access.redhat.com/errata/RHSA-2026:30849 -
References () https://access.redhat.com/errata/RHSA-2026:30850 - () https://access.redhat.com/errata/RHSA-2026:30850 -
References () https://access.redhat.com/errata/RHSA-2026:32962 - () https://access.redhat.com/errata/RHSA-2026:32962 -
References () https://access.redhat.com/errata/RHSA-2026:33125 - () https://access.redhat.com/errata/RHSA-2026:33125 -
References () https://access.redhat.com/security/cve/CVE-2026-33845 - Vendor Advisory () https://access.redhat.com/security/cve/CVE-2026-33845 - Vendor Advisory
References () https://bugzilla.redhat.com/show_bug.cgi?id=2450624 - Issue Tracking, Vendor Advisory () https://bugzilla.redhat.com/show_bug.cgi?id=2450624 - Issue Tracking, Vendor Advisory

29 Jun 2026, 21:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:33125 -

29 Jun 2026, 12:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:32962 -

29 Jun 2026, 09:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:30849 -
  • () https://access.redhat.com/errata/RHSA-2026:30850 -

26 Jun 2026, 08:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:30004 -

24 Jun 2026, 17:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:29197 -

17 Jun 2026, 13:20

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:26319 -
  • () https://access.redhat.com/errata/RHSA-2026:26409 -

02 Jun 2026, 16:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:20612 -

01 Jun 2026, 21:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:20613 -

27 May 2026, 04:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:20611 -

05 May 2026, 03:03

Type Values Removed Values Added
References () https://access.redhat.com/errata/RHSA-2026:13274 - () https://access.redhat.com/errata/RHSA-2026:13274 - Vendor Advisory
References () https://access.redhat.com/security/cve/CVE-2026-33845 - () https://access.redhat.com/security/cve/CVE-2026-33845 - Vendor Advisory
References () https://bugzilla.redhat.com/show_bug.cgi?id=2450624 - () https://bugzilla.redhat.com/show_bug.cgi?id=2450624 - Issue Tracking, Vendor Advisory
First Time Redhat
Redhat enterprise Linux
Gnu gnutls
Gnu
Redhat openshift Container Platform
CPE cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*

03 May 2026, 20:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:13274 -

30 Apr 2026, 18:16

Type Values Removed Values Added
New CVE

Information

Published : 2026-04-30 18:16

Updated : 2026-07-20 12:18


NVD link : CVE-2026-33845

Mitre link : CVE-2026-33845

CVE.ORG link : CVE-2026-33845


JSON object : View

Products Affected

gnu

  • gnutls

redhat

  • openshift_container_platform
  • enterprise_linux
CWE
CWE-191

Integer Underflow (Wrap or Wraparound)