CVE-2026-33845
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability82. percentile2.1%
Product
Gnutls
PublishedApr 30, 2026
First seenApr 30, 2026
Weakness typeCWE-191CWE-191
How to fix
Vendor advisories
- access.redhat.com/errata/RHSA-2026:13274
- access.redhat.com/security/cve/CVE-2026-33845
- bugzilla.redhat.com/show_bug.cgi?id=2450624
- access.redhat.com/errata/RHSA-2026:20611
- access.redhat.com/errata/RHSA-2026:20612
- access.redhat.com/errata/RHSA-2026:20613
- access.redhat.com/errata/RHSA-2026:26319
- access.redhat.com/errata/RHSA-2026:26409
- access.redhat.com/errata/RHSA-2026:29197
- access.redhat.com/errata/RHSA-2026:30004
- access.redhat.com/errata/RHSA-2026:30849
- access.redhat.com/errata/RHSA-2026:30850
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gnu gnutls | No range specified | — |
| redhat openshift_container_platform | 4.0 | — |
| redhat enterprise_linux | 6.0, 7.0, 8.0, 9.0, 10.0 | — |
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