Fluid Attacks Database

Description

A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version	Patched versions
debian 11	gnutls28	=3.7.1-5 \|\| =3.7.1-5+deb11u1 \|\| =3.7.1-5+deb11u2 \|\| =3.7.1-5+deb11u3 \|\| =3.7.1-5+deb11u4 \|\| =3.7.1-5+deb11u5 \|\| =3.7.1-5+deb11u6 \|\| =3.7.1-5+deb11u7 \|\| =3.7.1-5+deb11u8 \|\| =3.7.1-5+deb11u9 \|\| >=0 <3.7.1-5+deb11u10	3.7.1-5+deb11u10
debian 12	gnutls28	=3.7.9-2 \|\| =3.7.9-2+deb12u1 \|\| =3.7.9-2+deb12u2 \|\| =3.7.9-2+deb12u3 \|\| =3.7.9-2+deb12u4 \|\| =3.7.9-2+deb12u5 \|\| =3.7.9-2+deb12u6 \|\| >=0 <3.7.9-2+deb12u7	3.7.9-2+deb12u7
debian 13	gnutls28	=3.8.9-3 \|\| =3.8.9-3+deb13u1 \|\| =3.8.9-3+deb13u2 \|\| =3.8.9-3+deb13u3 \|\| >=0 <3.8.9-3+deb13u4	3.8.9-3+deb13u4
debian 14	gnutls28	=3.8.10-1 \|\| =3.8.10-2 \|\| =3.8.10-3 \|\| =3.8.11-1 \|\| =3.8.11-2 \|\| =3.8.11-3 \|\| =3.8.12-1 \|\| =3.8.12-2 \|\| =3.8.12-3 \|\| =3.8.12-4 \|\| =3.8.9-3 \|\| >=0 <3.8.13-1	3.8.13-1
alpine v3.20	gnutls	>=0 <3.8.13-r0	3.8.13-r0
alpine v3.21	gnutls	>=0 <3.8.13-r0	3.8.13-r0
alpine v3.22	gnutls	>=0 <3.8.13-r0	3.8.13-r0
alpine v3.23	gnutls	>=0 <3.8.13-r0	3.8.13-r0
rpm rhel10	gnutls	<0:3.8.10-4.el10_2	0:3.8.10-4.el10_2
rpm rhel7	gnutls	-	-

1-10 of 19

Aliases

1. CVE-2026-420092. NVD-2026-420093. OSV-DEBIAN-2026-420094. OSV-2026-420095. OSV-ALPINE-2026-420096. SECURITY-TRACKER-CVE-2026-420097. SECURITY-CVE-2026-42009

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