RHSA-2026:9666 - Security Advisory

Topic

An update for wireshark is now available for Red Hat Enterprise Linux 10.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The wireshark packages contain a network protocol analyzer used to capture and browse the traffic running on a computer network.

Security Fix(es):

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

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 10 x86_64
• Red Hat Enterprise Linux for IBM z Systems 10 s390x
• Red Hat Enterprise Linux for Power, little endian 10 ppc64le
• Red Hat Enterprise Linux for ARM 64 10 aarch64
• Red Hat CodeReady Linux Builder for x86_64 10 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 10 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 10 aarch64
• Red Hat CodeReady Linux Builder for IBM z Systems 10 s390x

Fixes

• BZ - 2442639 - CVE-2026-3203 wireshark: Buffer Over-read in Wireshark
• BZ - 2442641 - CVE-2026-3201 wireshark: Improperly Controlled Sequential Memory Allocation in Wireshark

CVEs

• CVE-2026-3201
• CVE-2026-3203

References

• https://access.redhat.com/security/updates/classification/#moderate