CVE-2021-4181: debian debian_linux Out-of-bounds Read
CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2021-4181DEBIAN-CVE-2021-4181
Published 30-12-2021Last modified 03-11-2025
Vulnerability summary
CVE-2021-4181 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 3.77% chance of exploitation in the next 30 days, higher than 89.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
3.77%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 6 · Related 3Timeline
- 30-12-2021PublishedVulnerability first disclosed.
- 03-11-2025Last modifiedVulnerability information updated.
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
CVSS metrics
5 scores · 4 sources · 2 versionsHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
3.77%
Chance of exploitation in the next 30 days
Percentile
90%
Versus all other CVEs
30-day change
0.00 pp
From 3.77% on 18-09-2026
18-09-202618-10-2026
EPSS score3.77%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (gitlab.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian2 products
- wireshark< 3.6.2-1
- debian_linuxEOL9.0
Oracle2 products
- http_server12.2.1.3.0 | 12.2.1.4.0
- zfs_storage_appliance_kit8.8
Fedoraproject1 product
- fedoraEOL34 | 35
Ubuntu1 product
- wireshark< 2.6.10-1~ubuntu18.04.0 | < 3.2.3-1 | < 3.6.2-2 | < 4.2.2-1.1build3 | < 4.4.5-1
Wireshark1 product
- wiresharkEOL≥ 3.4.0, < 3.4.11 | 3.6.0
Wireshark foundation1 product
- wireshark=3.6.0 | ≥ 3.4.0, < 3.4.10
6 vendors · 8 products
References
13 links- lists.fedoraproject.org/archives/…Vendor Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
- www.oracle.com/security-alerts/cpuapr2022.htmlThird Party Advisory
