Candump log parser crash in Wireshark 4.0.0 to 4.0.5 and 3.6.0 to 3.6.13 allows denial of service via crafted capture file

Description

Candump log parser crash in Wireshark 4.0.0 to 4.0.5 and 3.6.0 to 3.6.13 allows denial of service via crafted capture file

Scores

EPSS (exploitation in 30 days)

1.6% · top 23% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.

Weakness

• Buffer over-read in Wireshark
• CWE-787 Out-of-bounds Write (opens in a new tab)All about CWE-787 and its CVEs

Affected products

• Wireshark Foundation · Wireshark

  • affected >=4.0.0, <4.0.6
  • affected >=3.6.0, <3.6.14

References (6)

• https://www.wireshark.org/security/wnpa-sec-2023-12.html (opens in a new tab)x_transferred
• https://gitlab.com/wireshark/wireshark/-/issues/19062 (opens in a new tab)x_transferred
• https://gitlab.com/gitlab-org/cves/-/blob/master/2023/CVE-2023-2855.json (opens in a new tab)x_transferred
• DSA-5429 (opens in a new tab)vendor-advisoryx_transferred
• GLSA-202309-02 (opens in a new tab)vendor-advisoryx_transferred
• https://lists.debian.org/debian-lts-announce/2024/09/msg00049.html (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2023-2855](https://trackcve.app/badge/CVE-2023-2855.svg)](https://trackcve.app/cve/CVE-2023-2855)

Record last updated 3 Nov 2025, 21:47 UTC.