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.
Problem types
Integer Underflow (Wrap or Wraparound)
Product status
Any version before 3.8.13
0:3.8.10-4.el10_2 (rpm) before *
0:3.6.16-8.el8_10.6 (rpm) before *
0:3.6.16-8.el8_10.6 (rpm) before *
0:3.8.10-4.el9_8 (rpm) before *
0:3.8.10-4.el9_8 (rpm) before *
3.8.13-1.hum1 (rpm) before *
Timeline
| 2026-03-24: | Reported to Red Hat. |
| 2026-04-30: | Made public. |
References
access.redhat.com/errata/RHSA-2026:13274 (RHSA-2026:13274)
access.redhat.com/errata/RHSA-2026:20611 (RHSA-2026:20611)
access.redhat.com/errata/RHSA-2026:20612 (RHSA-2026:20612)
access.redhat.com/errata/RHSA-2026:20613 (RHSA-2026:20613)
access.redhat.com/security/cve/CVE-2026-33845
bugzilla.redhat.com/show_bug.cgi?id=2450624 (RHBZ#2450624)