# CVE-2026-76886: wireshark: C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service CVE-2026-76886 is fixed in 5 products on 1 platform, first by DEBIAN-CVE-2026-76886, released August 28, 2026. It is not reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2026-76886 - Priority: Urgent - CVSS: 9.8 (critical) - EPSS: 0.0038 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Aug 19, 2026 ## Description C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | wireshark Debian 13.5 (trixie) | 4.4.18-0+deb13u1 | [DEBIAN-CVE-2026-76886](https://patchblox.com/security/data/fix/linux/debian-cve-2026-76886.md) | Aug 28, 2026 | | Linux | wireshark Debian 14 | 4.6.9-1 | [DEBIAN-CVE-2026-76886](https://patchblox.com/security/data/fix/linux/debian-cve-2026-76886.md) | Aug 28, 2026 | | Linux | wireshark RHEL 10 | 4.4.2-10.el10_2.8 | [RHSA-2026:84721](https://patchblox.com/security/data/fix/linux/rhsa-2026-84721.md) | Oct 19, 2026 | | Linux | wireshark RHEL 8 | 1:2.6.2-21.el8_10 | [RHSA-2026:83657](https://patchblox.com/security/data/fix/linux/rhsa-2026-83657.md) | Oct 16, 2026 | | Linux | wireshark RHEL 9 | 1:3.4.10-9.el9_8.5 | [RHSA-2026:83546](https://patchblox.com/security/data/fix/linux/rhsa-2026-83546.md) | Oct 16, 2026 | | Linux | wireshark almalinux 10 | 1:4.4.2-10.el10_2.8 | [ALSA-2026:84721](https://patchblox.com/security/data/fix/linux/alsa-2026-84721.md) | Nov 7, 2026 | | Linux | wireshark almalinux 8 | 1:2.6.2-21.el8_10 | [ALSA-2026:83657](https://patchblox.com/security/data/fix/linux/alsa-2026-83657.md) | Nov 7, 2026 | | Linux | wireshark almalinux 9 | 1:3.4.10-9.el9_8.5 | [ALSA-2026:83546](https://patchblox.com/security/data/fix/linux/alsa-2026-83546.md) | Nov 7, 2026 | | Linux | wireshark ol 10 | 1:4.4.2-10.0.1.el10_2.8 | [ELSA-2026-84721](https://patchblox.com/security/data/fix/linux/elsa-2026-84721.md) | Nov 7, 2026 | | Linux | wireshark ol 8 | 1:2.6.2-21.el8_10 | [ELSA-2026-83657](https://patchblox.com/security/data/fix/linux/elsa-2026-83657.md) | Nov 7, 2026 | | Linux | wireshark ol 9 | 1:3.4.10-9.el9_8.5 | [ELSA-2026-83546](https://patchblox.com/security/data/fix/linux/elsa-2026-83546.md) | Nov 7, 2026 | | Linux | wireshark opensuse-leap 16.0 | 4.4.18-160000.1.1 | [OPENSUSE-SU-2026:22014-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22014-1.md) | Oct 2, 2026 | | Linux | wireshark rocky 10 | 1:4.4.2-10.el10_2.8 | [RLSA-2026:84721](https://patchblox.com/security/data/fix/linux/rlsa-2026-84721.md) | Nov 7, 2026 | | Linux | wireshark rocky 8 | 1:2.6.2-21.el8_10 | [RLSA-2026:83657](https://patchblox.com/security/data/fix/linux/rlsa-2026-83657.md) | Nov 7, 2026 | | Linux | wireshark rocky 9 | 1:3.4.10-9.el9_8.5 | [RLSA-2026:83546](https://patchblox.com/security/data/fix/linux/rlsa-2026-83546.md) | Nov 7, 2026 | | Linux | wireshark sles 15.7 | 4.6.8-150700.21.14.1 | [SUSE-SU-2026:4379-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4379-1.md) | Sep 28, 2026 | | Linux | wireshark sles 16.0 | 4.4.18-160000.1.1 | [SUSE-SU-2026:24013-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24013-1.md) | Oct 2, 2026 | | Linux | wireshark-cli RHEL 8 | 1:2.6.2-21.el8_10 | [RHSA-2026:83657](https://patchblox.com/security/data/fix/linux/rhsa-2026-83657.md) | Oct 16, 2026 | | Linux | wireshark-cli RHEL 9 | 1:3.4.10-9.el9_8.5 | [RHSA-2026:83546](https://patchblox.com/security/data/fix/linux/rhsa-2026-83546.md) | Oct 16, 2026 | | Linux | wireshark-cli almalinux 10 | 1:4.4.2-10.el10_2.8 | [ALSA-2026:84721](https://patchblox.com/security/data/fix/linux/alsa-2026-84721.md) | Nov 7, 2026 | | Linux | wireshark-cli almalinux 8 | 1:2.6.2-21.el8_10 | [ALSA-2026:83657](https://patchblox.com/security/data/fix/linux/alsa-2026-83657.md) | Nov 7, 2026 | | Linux | wireshark-cli almalinux 9 | 1:3.4.10-9.el9_8.5 | [ALSA-2026:83546](https://patchblox.com/security/data/fix/linux/alsa-2026-83546.md) | Nov 7, 2026 | | Linux | wireshark-cli amzn 2023 | 1:4.6.8-1.amzn2023.0.1 | [ALAS2023-2026-2117](https://patchblox.com/security/data/fix/linux/alas2023-2026-2117.md) | Aug 31, 2026 | | Linux | wireshark-cli ol 10 | 1:4.4.2-10.0.1.el10_2.8 | [ELSA-2026-84721](https://patchblox.com/security/data/fix/linux/elsa-2026-84721.md) | Nov 7, 2026 | | Linux | wireshark-cli ol 8 | 1:2.6.2-21.el8_10 | [ELSA-2026-83657](https://patchblox.com/security/data/fix/linux/elsa-2026-83657.md) | Nov 7, 2026 | | Linux | wireshark-cli ol 9 | 1:3.4.10-9.el9_8.5 | [ELSA-2026-83546](https://patchblox.com/security/data/fix/linux/elsa-2026-83546.md) | Nov 7, 2026 | | Linux | wireshark-cli-debuginfo amzn 2023 | 1:4.6.8-1.amzn2023.0.1 | [ALAS2023-2026-2117](https://patchblox.com/security/data/fix/linux/alas2023-2026-2117.md) | Aug 31, 2026 | | Linux | wireshark-debugsource amzn 2023 | 1:4.6.8-1.amzn2023.0.1 | [ALAS2023-2026-2117](https://patchblox.com/security/data/fix/linux/alas2023-2026-2117.md) | Aug 31, 2026 | | Linux | wireshark-devel RHEL 8 | 1:2.6.2-21.el8_10 | [RHSA-2026:83657](https://patchblox.com/security/data/fix/linux/rhsa-2026-83657.md) | Oct 16, 2026 | | Linux | wireshark-devel RHEL 9 | 1:3.4.10-9.el9_8.5 | [RHSA-2026:83546](https://patchblox.com/security/data/fix/linux/rhsa-2026-83546.md) | Oct 16, 2026 | | Linux | wireshark-devel almalinux 10 | 1:4.4.2-10.el10_2.8 | [ALSA-2026:84721](https://patchblox.com/security/data/fix/linux/alsa-2026-84721.md) | Nov 7, 2026 | | Linux | wireshark-devel almalinux 8 | 1:2.6.2-21.el8_10 | [ALSA-2026:83657](https://patchblox.com/security/data/fix/linux/alsa-2026-83657.md) | Nov 7, 2026 | | Linux | wireshark-devel almalinux 9 | 1:3.4.10-9.el9_8.5 | [ALSA-2026:83546](https://patchblox.com/security/data/fix/linux/alsa-2026-83546.md) | Nov 7, 2026 | | Linux | wireshark-devel amzn 2023 | 1:4.6.8-1.amzn2023.0.1 | [ALAS2023-2026-2117](https://patchblox.com/security/data/fix/linux/alas2023-2026-2117.md) | Aug 31, 2026 | | Linux | wireshark-devel ol 10 | 1:4.4.2-10.0.1.el10_2.8 | [ELSA-2026-84721](https://patchblox.com/security/data/fix/linux/elsa-2026-84721.md) | Nov 7, 2026 | | Linux | wireshark-devel ol 8 | 1:2.6.2-21.el8_10 | [ELSA-2026-83657](https://patchblox.com/security/data/fix/linux/elsa-2026-83657.md) | Nov 7, 2026 | | Linux | wireshark-devel ol 9 | 1:3.4.10-9.el9_8.5 | [ELSA-2026-83546](https://patchblox.com/security/data/fix/linux/elsa-2026-83546.md) | Nov 7, 2026 | --- Data as of 2026-11-08T06:59:42Z UTC. 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