Vulnerability · Published Jan 5, 2022 · Assigned by Tcpdump
CVE-2021-41043
Medium 5.5
In plain English
A medium-severity use-after-free in tcpslice from The Tcpdump Group. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 61% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.9%top 39.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Use after free in tcpslice triggers AddressSanitizer, no other confirmed impact.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | tcpdump | 14:4.9.3-3.el8_9.1.alma.1 | ALSA-2024:0769 |
| AlmaLinux:9 | tcpdump | 14:4.99.0-9.el9 | ALSA-2024:2211 |
| Debian:12 | tcpslice | 1.5-1 | DEBIAN-CVE-2021-41043 |
| Debian:13 | tcpslice | 1.5-1 | DEBIAN-CVE-2021-41043 |
| Debian:14 | tcpslice | 1.5-1 | DEBIAN-CVE-2021-41043 |
| Rocky Linux:8 | tcpdump | 4:4.9.3-3.el8_9.1 | RLSA-2024:0769 |
| Rocky Linux:9 | tcpdump | 4:4.99.0-9.el9 | RLSA-2024:2211 |
| Ubuntu:22.04:LTS | tcpslice | no fix listed | UBUNTU-CVE-2021-41043 |
| Ubuntu:24.04:LTS | tcpslice | no fix listed | UBUNTU-CVE-2021-41043 |
| Ubuntu:25.10 | tcpslice | no fix listed | UBUNTU-CVE-2021-41043 |
| Ubuntu:26.04:LTS | tcpslice | no fix listed | UBUNTU-CVE-2021-41043 |
| Ubuntu:26.10 | tcpslice | no fix listed | UBUNTU-CVE-2021-41043 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| The Tcpdump Group | tcpslice | unspecified – before 1.5 |
Weakness: CWE-416
References
- https://github.com/the-tcpdump-group/tcpslice/issues/11 x_refsource_MISC