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Vulnerabilities

Vulnerability · CVE-2019-20795

iproute2 before 5.1.0 has a use-after-free in get_netnsid_from_name in ip/ipnetns.c.

Published May 9, 2020 · catalog updated Oct 14, 2026 · iproute2 project

Check if you run it

No confirmed exploitation is on record for CVE-2019-20795. EPSS is 0.40%. Act only if a listed version of iproute2 project is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.40%
Remediation
Advisory link
Affected products
cpe canonical/ubuntu linux · cpe iproute2 project/iproute2

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe canonical/ubuntu linux18.04
  • cpe iproute2 project/iproute2version unspecified

How to fix CVE-2019-20795

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2019-20795. EPSS is 0.40%. Act only if a listed version of iproute2 project is installed.

Which versions are affected?

Compare what you have installed with canonical/ubuntu linux 18.04. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-416: Use After Free. EPSS 0.40%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 9, 2020 · NIST NVD

    Detected

    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.

  2. Oct 14, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2019-20795

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2019-20795

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2019-20795

    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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.