GnuTLS Vulnerability in DTLS Handshake Parsing Affects Red Hat
CVE-2026-33845

7.5HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
30 April 2026

What is CVE-2026-33845?

A flaw in the GnuTLS implementation of the DTLS handshake parsing can lead to serious security risks. Specifically, the vulnerability allows for the creation of malformed fragments with a zero length and a non-zero offset. This leads to an integer underflow during the reassembly process, which may trigger an out-of-bounds read. Such a scenario poses a risk for remote exploitation, potentially resulting in information disclosure or denial of service effects. It is crucial for users of GnuTLS to stay informed about this vulnerability and apply necessary patches or updates.

References

https://access.redhat.com/security/cve/CVE-2026-33845
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2450624
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.