# CVE-2021-41043: tcpdump: The tcpdump packages contain the tcpdump utility for monitoring network traffic

CVE-2021-41043 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2021-41043, released January 5, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-41043
- Priority: Routine
- CVSS: 5.5 (Moderate)
- EPSS: 0.0093
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 5, 2022

## Description

The tcpdump packages contain the tcpdump utility for monitoring network traffic. The tcpdump utility can capture and display the packet headers on a particular network interface or on all interfaces.  Security Fix(es):  * tcpslice: use-after-free in extract_slice() (CVE-2021-41043)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | tcpdump RHEL 8 | 14:4.9.3-3.el8_9.1 | [RHSA-2024:0769](https://patchblox.com/security/data/fix/linux/rhsa-2024-0769.md) | Feb 12, 2024 |
| Linux | tcpdump RHEL 9 | 14:4.99.0-9.el9 | [RHSA-2024:2211](https://patchblox.com/security/data/fix/linux/rhsa-2024-2211.md) | Apr 30, 2024 |
| Linux | tcpdump almalinux 8 | 14:4.9.3-3.el8_9.1.alma.1 | [ALSA-2024:0769](https://patchblox.com/security/data/fix/linux/alsa-2024-0769.md) | Feb 12, 2024 |
| Linux | tcpdump almalinux 9 | 14:4.99.0-9.el9 | [ALSA-2024:2211](https://patchblox.com/security/data/fix/linux/alsa-2024-2211.md) | Apr 30, 2024 |
| Linux | tcpdump ol 8 | 14:4.9.3-3.el8_9.1 | [ELSA-2024-0769](https://patchblox.com/security/data/fix/linux/elsa-2024-0769.md) | Feb 13, 2024 |
| Linux | tcpdump ol 9 | 14:4.99.0-9.el9 | [ELSA-2024-2211](https://patchblox.com/security/data/fix/linux/elsa-2024-2211.md) | May 2, 2024 |
| Linux | tcpdump rocky 8 | 4:4.9.3-3.el8_9.1 | [RLSA-2024:0769](https://patchblox.com/security/data/fix/linux/rlsa-2024-0769.md) | Mar 12, 2024 |
| Linux | tcpdump rocky 9 | 4:4.99.0-9.el9 | [RLSA-2024:2211](https://patchblox.com/security/data/fix/linux/rlsa-2024-2211.md) | May 7, 2025 |
| Linux | tcpslice Debian 12.15 (bookworm) | 1.5-1 | [DEBIAN-CVE-2021-41043](https://patchblox.com/security/data/fix/linux/debian-cve-2021-41043.md) | Jan 5, 2022 |
| Linux | tcpslice Debian 13.5 (trixie) | 1.5-1 | [DEBIAN-CVE-2021-41043](https://patchblox.com/security/data/fix/linux/debian-cve-2021-41043.md) | Jan 5, 2022 |
| Linux | tcpslice Debian 14 | 1.5-1 | [DEBIAN-CVE-2021-41043](https://patchblox.com/security/data/fix/linux/debian-cve-2021-41043.md) | Jan 5, 2022 |

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Data as of 2026-11-10T01:44:33Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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