CVE-2021-4181
Crash in the Sysdig Event dissector in Wireshark 3.6.0 and 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file
02 Description
Crash in the Sysdig Event dissector in Wireshark 3.6.0 and 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 4.05% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 90.6% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-12-30 00:00Z4 YR AGO
- Last updated
- 2025-11-03 21:45Z11 MO AGO
- Reserved
- 2021-12-27
- Assigning CNA
- GitLab
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- Data version
- 5.2
- Document digest
- ab7126a95295d5f2cb71bc123fd1becb72e4ba66e1931e898fbcb1967dc24ccd
05 Affected products
06 References
- www.wireshark.orghttps://www.wireshark.org/security/wnpa-sec-2021-21.html
- gitlab.comhttps://gitlab.com/wireshark/wireshark/-/merge_requests/5429
- gitlab.comhttps://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4181.json
- lists.fedoraproject.orgFEDORA-2022-1daf93c51dhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5AEK3XTOIOGCGUILUFISMGX54YJXWGJ/
- lists.fedoraproject.orgFEDORA-2022-30411cb3c4https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q6XGBKWSQFCVYUN4ZK3O3NJIFP3OAFVT/
- lists.debian.org[debian-lts-announce] 20220331 [SECURITY] [DLA 2967-1] wireshark security updatehttps://lists.debian.org/debian-lts-announce/2022/03/msg00041.html
- www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2022.html
- security.gentoo.orgGLSA-202210-04https://security.gentoo.org/glsa/202210-04
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/09/msg00049.html
07 Fixed in
Debian 12
- wireshark Fixed in 3.6.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- wireshark Fixed in 3.6.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- wireshark Fixed in 3.6.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.