RHSA-2026:97879 - Security Advisory

Topic

An update for wireshark is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of Important. 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: Wireshark: Denial of Service via C12.22 protocol dissector crash (CVE-2026-76886)
• wireshark: Wireshark: Denial of Service via RRC protocol dissector out-of-bounds write (CVE-2026-76880)
• wireshark: Wireshark: Denial of Service vulnerability in ESS protocol dissector (CVE-2026-76919)
• wireshark: Wireshark: Denial of Service vulnerability in H.245 protocol dissector (CVE-2026-76927)
• wireshark: wireshark: Denial of Service via heap-based buffer overflow in SPDY dissector (CVE-2026-95387)

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 9 x86_64
• Red Hat Enterprise Linux for IBM z Systems 9 s390x
• Red Hat Enterprise Linux for Power, little endian 9 ppc64le
• Red Hat Enterprise Linux for ARM 64 9 aarch64
• Red Hat CodeReady Linux Builder for x86_64 9 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 9 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 9 aarch64
• Red Hat CodeReady Linux Builder for IBM z Systems 9 s390x

Fixes

• BZ - 2520079 - CVE-2026-76886 wireshark: Wireshark: Denial of Service via C12.22 protocol dissector crash
• BZ - 2520088 - CVE-2026-76880 wireshark: Wireshark: Denial of Service via RRC protocol dissector out-of-bounds write
• BZ - 2520093 - CVE-2026-76919 wireshark: Wireshark: Denial of Service vulnerability in ESS protocol dissector
• BZ - 2520103 - CVE-2026-76927 wireshark: Wireshark: Denial of Service vulnerability in H.245 protocol dissector
• BZ - 2543033 - CVE-2026-95387 wireshark: wireshark: Denial of Service via heap-based buffer overflow in SPDY dissector

CVEs

• CVE-2026-76880
• CVE-2026-76886
• CVE-2026-76919
• CVE-2026-76927
• CVE-2026-95387

References

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