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BoardVulnerabilities › CVE-2026-42010
9.8Critical CVE-2026-42010 Gnu

A flaw was found in gnutls.

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

What happened

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.

Does it affect you

Not enough information

No products recorded, so this cannot be matched against anything.

What to do

  • Follow the vendor advisory for the fixed release and any interim mitigation.
    access.redhat.com
  • Follow the vendor advisory for the fixed release and any interim mitigation.
    bugzilla.redhat.com

Vendor's affected list

rhel
Exactly 6.0

Sources

A verdict here is derived from what you told us and what the vendor published. It is not an assessment of your environment. Why we never say you are safe.