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MEDIUM

CVE-2019-16994

CVSS v3

4.7

MEDIUM

EPSS Score

0.5 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2019-16994 Red Hat Product Security358 products fixed · 43 known affected

    kernel: Memory leak in sit_init_net() in net/ipv6/sit.c

    kernel.src as a component of Red Hat Enterprise Linux 5 · kernel as a component of Red Hat Enterprise Linux 6 · kernel-abi-whitelists as a component of Red Hat Enterprise Linux 6

  • RHSA-2020:4060 Red Hat Product Security174 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

  • RHSA-2020:4062 Red Hat Product Security30 products fixed

    Red Hat Security Advisory: kernel-rt security and bug fix update

  • RHSA-2019:3517 Red Hat Product Security120 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

  • RHSA-2019:3309 Red Hat Product Security34 products fixed

    Red Hat Security Advisory: kernel-rt security and bug fix update

Full record on NVD

Description

In the Linux kernel before 5.0, a memory leak exists in sit_init_net() in net/ipv6/sit.c when register_netdev() fails to register sitn->fb_tunnel_dev, which may cause denial of service, aka CID-07f12b26e21a.

Technical details

Published
2019-09-30

Frequently asked questions

What is CVE-2019-16994?

In the Linux kernel before 5.0, a memory leak exists in sit_init_net() in net/ipv6/sit.c when register_netdev() fails to register sitn->fb_tunnel_dev, which may cause denial of service, aka CID-07f12b26e21a.

Is CVE-2019-16994 actively exploited?

Active exploitation of CVE-2019-16994 has not been confirmed. Its EPSS score was 0.5% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-16994?

CVE-2019-16994 has a CVSS v3 base score of 4.7 (MEDIUM severity).

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