CVE-2026-33845CWE-191

CVE-2026-33845

High · published April 30, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
58.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00886 · 58.9th percentile
Weakness
CWE-191 · Integer Underflow (Wrap or Wraparound)
Published
2026-04-30T22:16Z
Affected products (7)
ProductVersionsFixed in
gnu/gnutlsall versions—
redhat/openshift_container_platformall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
References (66)
https://access.redhat.com/errata/RHSA-2026:13274 · [email protected]https://access.redhat.com/errata/RHSA-2026:20611 · [email protected]https://access.redhat.com/errata/RHSA-2026:20612 · [email protected]https://access.redhat.com/errata/RHSA-2026:20613 · [email protected]https://access.redhat.com/errata/RHSA-2026:26319 · [email protected]https://access.redhat.com/errata/RHSA-2026:26409 · [email protected]https://access.redhat.com/errata/RHSA-2026:29197 · [email protected]https://access.redhat.com/errata/RHSA-2026:30004 · [email protected]https://access.redhat.com/errata/RHSA-2026:30849 · [email protected]https://access.redhat.com/errata/RHSA-2026:30850 · [email protected]https://access.redhat.com/errata/RHSA-2026:32962 · [email protected]https://access.redhat.com/errata/RHSA-2026:33125 · [email protected]https://access.redhat.com/errata/RHSA-2026:34372 · [email protected]https://access.redhat.com/errata/RHSA-2026:36004 · [email protected]https://access.redhat.com/errata/RHSA-2026:36005 · [email protected]https://access.redhat.com/errata/RHSA-2026:36006 · [email protected]https://access.redhat.com/errata/RHSA-2026:41921 · [email protected]https://access.redhat.com/errata/RHSA-2026:56911 · [email protected]https://access.redhat.com/errata/RHSA-2026:57402 · [email protected]https://access.redhat.com/errata/RHSA-2026:72502 · [email protected]https://access.redhat.com/errata/RHSA-2026:74674 · [email protected]https://access.redhat.com/security/cve/CVE-2026-33845 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2450624 · [email protected]https://access.redhat.com/errata/RHSA-2026:56786 · [email protected]https://access.redhat.com/errata/RHSA-2026:56853 · [email protected]https://access.redhat.com/errata/RHSA-2026:57483 · [email protected]https://access.redhat.com/errata/RHSA-2026:58981 · [email protected]https://access.redhat.com/errata/RHSA-2026:59831 · [email protected]https://access.redhat.com/errata/RHSA-2026:60019 · [email protected]https://access.redhat.com/errata/RHSA-2026:65839 · [email protected]https://access.redhat.com/errata/RHSA-2026:82304 · [email protected]https://access.redhat.com/errata/RHSA-2026:82322 · [email protected]https://access.redhat.com/errata/RHSA-2026:82347 · [email protected]https://access.redhat.com/errata/RHSA-2026:82354 · [email protected]https://access.redhat.com/errata/RHSA-2026:82372 · [email protected]https://access.redhat.com/errata/RHSA-2026:82857 · [email protected]https://access.redhat.com/errata/RHSA-2026:82888 · [email protected]https://access.redhat.com/errata/RHSA-2026:13274 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:20611 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:20612 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:20613 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:26319 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:26409 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:29197 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:30004 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:30849 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:30850 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:32962 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:33125 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:34372 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:36004 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:36005 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:36006 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:41921 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:56786 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:56853 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:56911 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:57402 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:57483 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:58981 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:59831 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:60019 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:65839 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-33845 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2450624 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33845.json · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
EPSS history
Timeline
  • 30 APR 17:41Z
    Gnutls: gnutls: denial of service via dtls zero-length fragment
    cvelistv5