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CVE-2021-41043

20
FAUCET Score

CVE-2021-41043 describes a use-after-free vulnerability in tcpslice, a component of tcpdump. This flaw, rated Medium with a CVSS score of 5.5, requires local access and user interaction (UI:R) to trigger, leading to a denial of service (A:H) but no confirmed impact on confidentiality or integrity. There is currently no evidence of active exploitation, no public exploit code available (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage, indicating a low immediate threat.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.5CPE matchmatch criteria
cpe:2.3:a:tcpdump:tcpslice:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.87%
Probability of exploitation in next 30 days
EPSS Percentile
55.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0087 is in the 64th percentile among its peer group of 5,765 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: tcpdump-14:4.9.3-3.el8_9.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: tcpdump-14:4.9.3-3.el8_6.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: tcpdump-14:4.9.3-3.el8_8.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: tcpdump-14:4.99.0-9.el9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: tcpdump-14:4.99.0-6.el9_2.1
View patch

Vendor Advisories (1)

redhatCVE-2021-41043Moderate

tcpslice: use-after-free in extract_slice()

Jan 5, 2022

References

github.com / the-tcpdump-group/tcpslice/issues/11
ExploitThird Party Advisory