CVE Catalog

CVE-2019-20795

MediumCVSS 4.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.40%

33th percentile - higher than 33% of all known CVEs

Summary

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

Risk Assessment

A local attacker could potentially exploit the use-after-free to perform unauthorized actions or destabilize the system, though the risk is limited to non-default setuid configurations. The organizational impact depends on whether iproute2 is used with elevated privileges.

Recommendation

Update iproute2 to version 5.1.0 or later. If possible, avoid setuid configurations for iproute2 and verify the C library configuration for exploitability constraints.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS