What’s Vulnerable › Vulnerabilities

CVE-2020-26575

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-10-06 · updated 2026-06-17
• Weakness: CWE-835

Description

In Wireshark through 3.2.7, the Facebook Zero Protocol (aka FBZERO) dissector could enter an infinite loop. This was addressed in epan/dissectors/packet-fbzero.c by correcting the implementation of offset advancement.

Affected products

• Debian Linux: 9.0
• Fedoraproject Fedora: 32, 33
• Oracle Zfs Storage Appliance Firmware: 8.8
• Wireshark Foundation Wireshark: through 3.2.7

References

• https://gitlab.com/wireshark/wireshark/-/commit/3ff940652962c099b73ae3233322b8697b0d10ab
• https://gitlab.com/wireshark/wireshark/-/issues/16887
• https://gitlab.com/wireshark/wireshark/-/merge_requests/467
• https://gitlab.com/wireshark/wireshark/-/merge_requests/471
• https://gitlab.com/wireshark/wireshark/-/merge_requests/472
• https://gitlab.com/wireshark/wireshark/-/merge_requests/473
• https://lists.debian.org/debian-lts-announce/2021/02/msg00008.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHZSVK7PO2LTGFQXFHFXY6SOMSQ7UPRS/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V2667E6WKVE56G66BVBVD7LJPIDOJ7K3/
• https://security.gentoo.org/glsa/202011-08
• https://www.oracle.com/security-alerts/cpujan2021.html
• https://www.wireshark.org/security/wnpa-sec-2020-14.html

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