What is RHSA-2026:9666?

RHSA-2026:9666 is a security advisory published by Red Hat Product Security with Medium severity. Red Hat Security Advisory: wireshark security update

Which CVE IDs does RHSA-2026:9666 cover?

RHSA-2026:9666 covers the following CVE IDs: CVE-2026-3201, CVE-2026-3203. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:9666?

RHSA-2026:9666 has a CVSS v3 base score of 5.5, published by Red Hat Product Security.

Which products are affected by RHSA-2026:9666?

RHSA-2026:9666 affects 39 products, including: Red Hat Enterprise Linux AppStream (v. 10); Red Hat Enterprise Linux CodeReady Linux Builder (v. 10); wireshark-1:4.4.2-4.el10_1.4.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); wireshark-1:4.4.2-4.el10_1.4.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); wireshark-1:4.4.2-4.el10_1.4.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); and others — see the full list on the advisory page.

RHSA-2026:9666MediumCVSS 5.5

Red Hat Security Advisory: wireshark security update

Vendor

Red Hat Product Security

Published

April 22, 2026

Last Modified

November 5, 2026

🔗 CVE IDs covered (2)

CVE-2026-3201 →CVE-2026-3203 →

📋 Description

CVE-2026-3201 — wireshark: Improperly Controlled Sequential Memory Allocation in Wireshark CVE-2026-3203 — wireshark: Buffer Over-read in Wireshark

🎯 Affected products39

Red Hat Enterprise Linux AppStream (v. 10)
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
wireshark-1:4.4.2-4.el10_1.4.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-1:4.4.2-4.el10_1.4.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-1:4.4.2-4.el10_1.4.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-1:4.4.2-4.el10_1.4.src as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-1:4.4.2-4.el10_1.4.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-cli-1:4.4.2-4.el10_1.4.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-cli-1:4.4.2-4.el10_1.4.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-cli-1:4.4.2-4.el10_1.4.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-cli-1:4.4.2-4.el10_1.4.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-cli-debuginfo-1:4.4.2-4.el10_1.4.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-cli-debuginfo-1:4.4.2-4.el10_1.4.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
wireshark-cli-debuginfo-1:4.4.2-4.el10_1.4.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-cli-debuginfo-1:4.4.2-4.el10_1.4.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
wireshark-cli-debuginfo-1:4.4.2-4.el10_1.4.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-cli-debuginfo-1:4.4.2-4.el10_1.4.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
wireshark-cli-debuginfo-1:4.4.2-4.el10_1.4.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-cli-debuginfo-1:4.4.2-4.el10_1.4.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
wireshark-debuginfo-1:4.4.2-4.el10_1.4.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-debuginfo-1:4.4.2-4.el10_1.4.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
wireshark-debuginfo-1:4.4.2-4.el10_1.4.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-debuginfo-1:4.4.2-4.el10_1.4.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
wireshark-debuginfo-1:4.4.2-4.el10_1.4.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-debuginfo-1:4.4.2-4.el10_1.4.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
wireshark-debuginfo-1:4.4.2-4.el10_1.4.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-debuginfo-1:4.4.2-4.el10_1.4.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
wireshark-debugsource-1:4.4.2-4.el10_1.4.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
wireshark-debugsource-1:4.4.2-4.el10_1.4.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
wireshark-debugsource-1:4.4.2-4.el10_1.4.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
+9 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: If the USB HID protocol dissector is not being used, it can be disabled via the "Enabled Protocols" dialog box in the Wireshark GUI application. This will also disable the protocol dissector when using "tshark", the command line tool. See the links below for instructions to disable a protocol in Wireshark, specifically the "Control Protocol Dissection" section and the "disabled_protos" configuration file option. https://www.wireshark.org/docs/wsug_html_chunked/ChCustProtocolDissectionSection.html https://www.wireshark.org/docs/wsug_html_chunked/ChAppFilesConfigurationSection.html Workaround: If the RF4CE Profile protocol dissector is not being used, it can be disabled via the "Enabled Protocols" dialog box in the Wireshark GUI application. This will also disable the protocol dissector when using "tshark", the command line tool. See the links below for instructions to disable a protocol in Wireshark, specifically the "Control Protocol Dissection" section and the "disabled_protos" configuration file option. https://www.wireshark.org/docs/wsug_html_chunked/ChCustProtocolDissectionSection.html https://www.wireshark.org/docs/wsug_html_chunked/ChAppFilesConfigurationSection.html

🔗 CVE IDs covered (2)

📋 Description

🎯 Affected products39

✅ Remediation

🔗 References (5)