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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.

PUBLISHED Reserved 2026-03-24 | Published 2026-04-30 | Updated 2026-06-02 | Assigner redhat




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

Integer Underflow (Wrap or Wraparound)

Product status

Default status
unaffected

Any version before 3.8.13
affected

Default status
affected

0:3.8.10-4.el10_2 (rpm) before *
unaffected

Default status
affected

0:3.6.16-8.el8_10.6 (rpm) before *
unaffected

Default status
affected

0:3.6.16-8.el8_10.6 (rpm) before *
unaffected

Default status
affected

0:3.8.10-4.el9_8 (rpm) before *
unaffected

Default status
affected

0:3.8.10-4.el9_8 (rpm) before *
unaffected

Default status
affected

3.8.13-1.hum1 (rpm) before *
unaffected

Default status
affected

Default status
affected

Default status
affected

Timeline

2026-03-24:Reported to Red Hat.
2026-04-30:Made public.

References

access.redhat.com/errata/RHSA-2026:13274 (RHSA-2026:13274) vendor-advisory

access.redhat.com/errata/RHSA-2026:20611 (RHSA-2026:20611) vendor-advisory

access.redhat.com/errata/RHSA-2026:20612 (RHSA-2026:20612) vendor-advisory

access.redhat.com/errata/RHSA-2026:20613 (RHSA-2026:20613) vendor-advisory

access.redhat.com/security/cve/CVE-2026-33845 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2450624 (RHBZ#2450624) issue-tracking

cve.org (CVE-2026-33845)

nvd.nist.gov (CVE-2026-33845)

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