Infinite loop in Wireshark - CVE-2026-0960

Vulnerability identifier: #VU121532

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-0960

CWE-ID: CWE-835

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in HTTP3 dissector. A remote attacker can consume all available system resources and cause denial of service conditions.

Wireshark
Debian Linux
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
Desktop Applications Module
Server Applications Module
Basesystem Module
openSUSE Leap
openEuler
wireshark-debuginfo
wireshark-devel
libwsutil15
wireshark
libwireshark17
libwsutil15-debuginfo
libwiretap14
libwireshark17-debuginfo
wireshark-ui-qt
wireshark-debugsource
wireshark-ui-qt-debuginfo
libwiretap14-debuginfo
wireshark (Debian package)
wireshark-help
libwiretap16-debuginfo
libwsutil17
libwireshark19-debuginfo
libwireshark19
libwiretap16
libwsutil17-debuginfo
libvirt-daemon-plugin-sanlock-debuginfo
libvirt-daemon-driver-storage-iscsi-debuginfo
libvirt-daemon-common
libvirt-daemon-driver-interface
libvirt-daemon-qemu
libvirt-daemon-driver-storage-iscsi
libvirt-daemon-driver-storage-scsi-debuginfo
libvirt-client-qemu
libvirt-daemon-driver-storage-logical-debuginfo
libvirt-daemon-driver-nodedev-debuginfo
libvirt-daemon-log
libvirt-daemon-driver-storage-disk
libvirt-daemon-plugin-lockd-debuginfo
libvirt-daemon-driver-interface-debuginfo
libvirt-daemon-config-network
libvirt-daemon-proxy-debuginfo
libvirt-daemon-driver-network
libvirt-daemon-hooks
libvirt-daemon-driver-libxl-debuginfo
libvirt-daemon-driver-storage
libvirt-daemon-common-debuginfo
libvirt-daemon-driver-qemu-debuginfo
libvirt-client-debuginfo
libvirt-daemon-plugin-sanlock
libvirt-daemon
libvirt-daemon-driver-storage-rbd
libvirt-daemon-driver-storage-rbd-debuginfo
libvirt-doc
libvirt-daemon-driver-libxl
libvirt-daemon-xen
libvirt-daemon-driver-storage-iscsi-direct
libvirt-libs-debuginfo
libvirt-libs
libvirt-debugsource
libvirt-daemon-driver-storage-core
libvirt-daemon-config-nwfilter
libvirt-daemon-driver-nwfilter-debuginfo
libvirt-daemon-proxy
libvirt-daemon-lock-debuginfo
libvirt-daemon-driver-storage-mpath
libvirt-nss
libvirt-client
libvirt
libvirt-daemon-driver-secret-debuginfo
libvirt-daemon-driver-storage-core-debuginfo
libvirt-daemon-lock
libvirt-daemon-driver-network-debuginfo
libvirt-daemon-debuginfo
libvirt-daemon-driver-nodedev
libvirt-daemon-driver-secret
libvirt-nss-debuginfo
libvirt-daemon-driver-qemu
libvirt-daemon-driver-storage-disk-debuginfo
libvirt-daemon-driver-storage-iscsi-direct-debuginfo
libvirt-daemon-plugin-lockd
libvirt-daemon-log-debuginfo
libvirt-daemon-driver-storage-logical
libvirt-daemon-driver-nwfilter
libvirt-daemon-driver-storage-scsi
libvirt-daemon-driver-storage-mpath-debuginfo
libvirt-devel

Install updates from vendor's website.

Wireshark - addressed in versions 4.4.13, 4.6.3
wireshark-debuginfo - addressed in versions 4.2.14-150600.18.35.1, 4.6.4-150700.21.8.1
wireshark-devel - addressed in versions 4.2.14-150600.18.35.1, 4.6.4-150700.21.8.1
libwsutil15 - update to 4.2.14-150600.18.35.1
wireshark - addressed in versions 4.2.14-150600.18.35.1, 4.6.4-150700.21.8.1
libwireshark17 - update to 4.2.14-150600.18.35.1
libwsutil15-debuginfo - update to 4.2.14-150600.18.35.1
libwiretap14 - update to 4.2.14-150600.18.35.1
libwireshark17-debuginfo - update to 4.2.14-150600.18.35.1
wireshark-ui-qt - addressed in versions 4.2.14-150600.18.35.1, 4.6.4-150700.21.8.1
wireshark-debugsource - addressed in versions 4.2.14-150600.18.35.1, 4.6.4-150700.21.8.1
wireshark-ui-qt-debuginfo - addressed in versions 4.2.14-150600.18.35.1, 4.6.4-150700.21.8.1
libwiretap14-debuginfo - update to 4.2.14-150600.18.35.1
wireshark (Debian package) - update to 4.4.13-0+deb13u1
wireshark-devel - update to 4.4.14-1
wireshark-help - update to 4.4.14-1
wireshark - update to 4.4.14-1
wireshark-debuginfo - update to 4.4.14-1
wireshark-debugsource - update to 4.4.14-1
libwiretap16-debuginfo - update to 4.6.4-150700.21.8.1
libwsutil17 - update to 4.6.4-150700.21.8.1
libwireshark19-debuginfo - update to 4.6.4-150700.21.8.1
libwireshark19 - update to 4.6.4-150700.21.8.1
libwiretap16 - update to 4.6.4-150700.21.8.1
libwsutil17-debuginfo - update to 4.6.4-150700.21.8.1
libvirt-daemon-plugin-sanlock-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-iscsi-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-common - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-interface - update to 11.0.0-150700.4.19.1
libvirt-daemon-qemu - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-iscsi - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-scsi-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-client-qemu - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-logical-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-nodedev-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-log - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-disk - update to 11.0.0-150700.4.19.1
libvirt-daemon-plugin-lockd-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-interface-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-config-network - update to 11.0.0-150700.4.19.1
libvirt-daemon-proxy-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-network - update to 11.0.0-150700.4.19.1
libvirt-daemon-hooks - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-libxl-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage - update to 11.0.0-150700.4.19.1
libvirt-daemon-common-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-qemu-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-client-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-plugin-sanlock - update to 11.0.0-150700.4.19.1
libvirt-daemon - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-rbd - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-rbd-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-doc - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-libxl - update to 11.0.0-150700.4.19.1
libvirt-daemon-xen - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-iscsi-direct - update to 11.0.0-150700.4.19.1
libvirt-libs-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-libs - update to 11.0.0-150700.4.19.1
libvirt-debugsource - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-core - update to 11.0.0-150700.4.19.1
libvirt-daemon-config-nwfilter - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-nwfilter-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-proxy - update to 11.0.0-150700.4.19.1
libvirt-daemon-lock-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-mpath - update to 11.0.0-150700.4.19.1
libvirt-nss - update to 11.0.0-150700.4.19.1
libvirt-client - update to 11.0.0-150700.4.19.1
libvirt - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-secret-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-core-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-lock - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-network-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-nodedev - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-secret - update to 11.0.0-150700.4.19.1
libvirt-nss-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-qemu - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-disk-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-iscsi-direct-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-plugin-lockd - update to 11.0.0-150700.4.19.1
libvirt-daemon-log-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-logical - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-nwfilter - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-scsi - update to 11.0.0-150700.4.19.1
libvirt-daemon-driver-storage-mpath-debuginfo - update to 11.0.0-150700.4.19.1
libvirt-devel - update to 11.0.0-150700.4.19.1

• https://www.wireshark.org/security/wnpa-sec-2026-04.html
• https://gitlab.com/wireshark/wireshark/-/issues/20944

• Multiple DoS vulnerabilities in Wireshark
• SUSE update for wireshark
• Debian update for wireshark
• openEuler 24.03 LTS SP2 update for wireshark
• openEuler 24.03 LTS SP1 update for wireshark
• openEuler 24.03 LTS update for wireshark
• openEuler 22.03 LTS SP4 update for wireshark
• openEuler 24.03 LTS SP3 update for wireshark
• SUSE update for wireshark