# CVE-2019-20795: iproute2: iproute2 before 5.1.0 has a use-after-free in get_netnsid_from_name in ip/ipnetns.c

CVE-2019-20795 is fixed in iproute2 on 1 platform by iproute2 4.15.0-2ubuntu1.1 (version 4.15.0-2ubuntu1.1), released May 9, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-20795
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0041
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 9, 2020

## Description

iproute2 before 5.1.0 has a use-after-free in get_netnsid_from_name in ip/ipnetns.c. NOTE: security relevance may be limited to certain uses of setuid that, although not a default, are sometimes a configuration option offered to end users. Even when setuid is used, other factors (such as C library configuration) may block exploitability.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | iproute2 Ubuntu 18.04.6 LTS (bionic) | 4.15.0-2ubuntu1.1 | [iproute2 4.15.0-2ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-iproute2-4.15.0-2ubuntu1.1.md) | May 9, 2020 |

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Data as of 2026-11-07T18:46:35Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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