CVE-2026-42010

A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.
References
Link Resource
https://access.redhat.com/errata/RHSA-2026:13274
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-2026:34764
https://access.redhat.com/errata/RHSA-2026:34788
https://access.redhat.com/errata/RHSA-2026:34790
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-2026-42010 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2467289 Issue Tracking Vendor Advisory
https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-4
https://access.redhat.com/errata/RHSA-2026:13274
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-2026:34764
https://access.redhat.com/errata/RHSA-2026:34788
https://access.redhat.com/errata/RHSA-2026:34790
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-2026-42010 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2467289 Issue Tracking Vendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42010.json
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
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, 12:19

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 -

08 Jul 2026, 13:16

Type Values Removed Values Added
References () https://access.redhat.com/errata/RHSA-2026:34764 - () https://access.redhat.com/errata/RHSA-2026:34764 -
References () https://access.redhat.com/errata/RHSA-2026:34788 - () https://access.redhat.com/errata/RHSA-2026:34788 -

07 Jul 2026, 19:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:34788 -

07 Jul 2026, 15:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:34764 -

07 Jul 2026, 12:16

Type Values Removed Values Added
References () https://access.redhat.com/errata/RHSA-2026:34790 - () https://access.redhat.com/errata/RHSA-2026:34790 -
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 -

07 Jul 2026, 10:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:34790 -

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 -

30 Jun 2026, 03:19

Type Values Removed Values Added
References
  • () https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42010.json -
References () https://access.redhat.com/errata/RHSA-2026:13274 - () https://access.redhat.com/errata/RHSA-2026:13274 -
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-2026-42010 - Vendor Advisory () https://access.redhat.com/security/cve/CVE-2026-42010 - Vendor Advisory
References () https://bugzilla.redhat.com/show_bug.cgi?id=2467289 - Issue Tracking, Vendor Advisory () https://bugzilla.redhat.com/show_bug.cgi?id=2467289 - Issue Tracking, Vendor Advisory

29 Jun 2026, 22:16

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 -

25 Jun 2026, 20:17

Type Values Removed Values Added
References
  • () https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-4 -

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 -

10 Jun 2026, 16:17

Type Values Removed Values Added
CWE CWE-170

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 -

14 May 2026, 23:16

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

13 May 2026, 13:54

Type Values Removed Values Added
First Time Redhat hardened Images
Gnu
Redhat openshift Container Platform
Redhat enterprise Linux
Gnu gnutls
Redhat
CPE cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
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:9.0:*:*:*:*:*:*:*
cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
References () https://access.redhat.com/security/cve/CVE-2026-42010 - () https://access.redhat.com/security/cve/CVE-2026-42010 - Vendor Advisory
References () https://bugzilla.redhat.com/show_bug.cgi?id=2467289 - () https://bugzilla.redhat.com/show_bug.cgi?id=2467289 - Issue Tracking, Vendor Advisory

07 May 2026, 15:16

Type Values Removed Values Added
New CVE

Information

Published : 2026-05-07 12:16

Updated : 2026-07-20 12:19


NVD link : CVE-2026-42010

Mitre link : CVE-2026-42010

CVE.ORG link : CVE-2026-42010


JSON object : View

Products Affected

redhat

  • enterprise_linux
  • openshift_container_platform
  • hardened_images

gnu

  • gnutls
CWE
CWE-170

Improper Null Termination

CWE-626

Null Byte Interaction Error (Poison Null Byte)