CVE-2020-26575

Name: CVE-2020-26575
Creator: NVD / NIST
Published: 2020-10-06T15:15:15.553+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.08%

Last modified Jun 17, 2026

CVE-2020-26575 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 3.08% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

3.08%

86.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-835

Affected Software

Vendor	Product	Versions
Wireshark	Wireshark	<= 3.2.7
Fedoraproject	Fedora	32
Fedoraproject	Fedora	33
Debian	Debian Linux	9.0
Oracle	Zfs Storage Appliance Firmware	8.8

References

https://gitlab.com/wireshark/wireshark/-/commit/3ff940652962c099b73ae3233322b8697b0d10abPatch, Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/issues/16887Broken Link
https://gitlab.com/wireshark/wireshark/-/merge_requests/467Patch, Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/merge_requests/471Patch, Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/merge_requests/472Patch, Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/merge_requests/473Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00008.htmlMailing List, Third Party Advisory
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/202011-08Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.htmlThird Party Advisory
https://www.wireshark.org/security/wnpa-sec-2020-14.htmlVendor Advisory
https://gitlab.com/wireshark/wireshark/-/commit/3ff940652962c099b73ae3233322b8697b0d10abPatch, Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/issues/16887Broken Link
https://gitlab.com/wireshark/wireshark/-/merge_requests/467Patch, Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/merge_requests/471Patch, Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/merge_requests/472Patch, Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/merge_requests/473Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00008.htmlMailing List, Third Party Advisory
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/202011-08Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.htmlThird Party Advisory
https://www.wireshark.org/security/wnpa-sec-2020-14.htmlVendor Advisory

Timeline

Published: Oct 6, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26575?

How severe is CVE-2020-26575?

CVE-2020-26575 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.08% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26575?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-26575?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST