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TI-2020-16149 Aliases CVE-2020-26421GHSA-955v-hqm3-9444

Out-of-bounds read in Wireshark

Priority LOW 29CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Deferred Red Hat: fix deferred

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

Crash in USB HID protocol dissector and possibly other dissectors in Wireshark 3.4.0 and 3.2.0 to 3.2.8 allows denial of service via packet injection or crafted capture file.

Why it matters now

EPSS 0.0255 85th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Deferred Red Hat: fix deferred

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Wireshark FoundationWireshark3.4.0; >= 3.2.0 to < 3.2.9—No fix listedCNA
  • Wireshark VendorWireshark Foundation Affected 3.4.0; >= 3.2.0 to < 3.2.9 Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*3.2.0 – 3.2.8VulnerableWireshark Foundation
cpe:2.3:a:wireshark:wireshark:3.4.0:*:*:*:*:*:*:*3.4.0VulnerableWireshark Foundation
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*32VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*8.8VulnerableOracle
  • cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:* Versions 3.2.0 – 3.2.8 Vulnerable ·Wireshark Foundation
  • cpe:2.3:a:wireshark:wireshark:3.4.0:*:*:*:*:*:*:* Versions 3.4.0 Vulnerable ·Wireshark Foundation
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* Versions 8.8 Vulnerable ·Oracle

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    The Wireshark Foundation Wireshark — FEDORA-2021-138674557c

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    Show all 4 records → Advisory →
  • Advisory ·

    The Wireshark Foundation Wireshark — FEDORA-2021-f3011da665

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    Show all 4 records → Advisory →
Show 1 more group

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-26421
  2. 2026-10-03 Alias added: GHSA-955v-hqm3-9444

References

Exploit 1

Patch 1

Advisory 6

  • TI-2026-53718 Heap-based Buffer Overflow in Wireshark CVSS 3.1CRITICAL 9.8
  • TI-2026-63612 Heap-based Buffer Overflow in Wireshark CVSS 3.1HIGH 8.8
  • TI-2024-16149 A buffer overflow in Wireshark before 4.2.0 allows a remote attacker to cause a denial of… CVSS 3.1HIGH 7.5
  • TI-2010-00291 Multiple buffer overflows in the LWRES dissector in Wireshark 0.9.15 through 1.0.10 and… CVSS 2.0HIGH 7.5
  • TI-2026-63614 Heap-based Buffer Overflow in Wireshark CVSS 3.1HIGH 8.1
  • TI-2014-01823 Buffer overflow in the mpeg_read function in wiretap/mpeg.c in the MPEG parser in… CVSS 2.0HIGH 9.3
See all 794 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences