CVE-2026-42010: Vulnerability in Red Hat Red Hat Enterprise Linux 10
CVE-2026-42010 is a vulnerability in the gnutls library used by Red Hat Enterprise Linux 10. It involves improper handling of usernames containing a NUL character in servers configured with RSA-PSK authentication, allowing a remote attacker to bypass authentication by sending a specially crafted username. This flaw can lead to unauthorized access by circumventing the authentication process. The vulnerability has a CVSS score of 7. 1, indicating high severity. No official patch or remediation level has been confirmed from the vendor advisory at this time.
AI Analysis
Technical Summary
This vulnerability affects gnutls in Red Hat Enterprise Linux 10 where servers using RSA-PSK authentication incorrectly match usernames containing a NUL character with truncated usernames. An attacker can exploit this by sending a crafted username to bypass authentication, gaining unauthorized access. The CVSS 3.1 vector indicates network attack vector, low attack complexity, requiring low privileges, no user interaction, unchanged scope, high confidentiality impact, low integrity impact, and no availability impact. The vendor advisory does not currently specify a remediation or patch status.
Potential Impact
The vulnerability allows remote attackers to bypass authentication on affected systems, potentially gaining unauthorized access. The confidentiality impact is high, meaning sensitive information could be exposed. Integrity impact is low, and availability is not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-42010 for current remediation guidance. Until an official fix is released, consider disabling RSA-PSK authentication if feasible or applying any recommended workarounds from Red Hat. Monitor the vendor advisory for updates.
CVE-2026-42010: Vulnerability in Red Hat Red Hat Enterprise Linux 10
Description
CVE-2026-42010 is a vulnerability in the gnutls library used by Red Hat Enterprise Linux 10. It involves improper handling of usernames containing a NUL character in servers configured with RSA-PSK authentication, allowing a remote attacker to bypass authentication by sending a specially crafted username. This flaw can lead to unauthorized access by circumventing the authentication process. The vulnerability has a CVSS score of 7. 1, indicating high severity. No official patch or remediation level has been confirmed from the vendor advisory at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects gnutls in Red Hat Enterprise Linux 10 where servers using RSA-PSK authentication incorrectly match usernames containing a NUL character with truncated usernames. An attacker can exploit this by sending a crafted username to bypass authentication, gaining unauthorized access. The CVSS 3.1 vector indicates network attack vector, low attack complexity, requiring low privileges, no user interaction, unchanged scope, high confidentiality impact, low integrity impact, and no availability impact. The vendor advisory does not currently specify a remediation or patch status.
Potential Impact
The vulnerability allows remote attackers to bypass authentication on affected systems, potentially gaining unauthorized access. The confidentiality impact is high, meaning sensitive information could be exposed. Integrity impact is low, and availability is not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-42010 for current remediation guidance. Until an official fix is released, consider disabling RSA-PSK authentication if feasible or applying any recommended workarounds from Red Hat. Monitor the vendor advisory for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-04-23T11:23:46.517Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-42010","vendor":"Red Hat"}]
Threat ID: 69fc83f6cbff5d8610e90d55
Added to database: 5/7/2026, 12:22:14 PM
Last enriched: 5/7/2026, 12:36:32 PM
Last updated: 5/7/2026, 1:27:23 PM
Views: 20
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