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CVE-2026-33845

critical

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…

Vendor / product: Gnu — gnutls

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.

CVSS
9.1
9.1 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-04-30 18:16
Modified: 2026-10-26 22:10
NVD status: Modified
Last synced 2 days ago
Verified against the source API 2026-10-27 07:07 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

gnu / gnutls all versions
redhat / openshift_container_platform 4.0
redhat / enterprise_linux 6.0, 7.0, 8.0, 9.0, 10.0

Weakness classification (CWE)

CWE-191

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://access.redhat.com/errata/RHSA-2026:13274
Vendor advisory: https://access.redhat.com/security/cve/CVE-2026-33845
Vendor advisory: https://bugzilla.redhat.com/show_bug.cgi?id=2450624
Vendor advisory: https://access.redhat.com/errata/RHSA-2026:13274
Vendor advisory: https://access.redhat.com/security/cve/CVE-2026-33845
Vendor advisory: https://bugzilla.redhat.com/show_bug.cgi?id=2450624

References

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 07:07 UTC · record ↗

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