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UBUNTU-CVE-2017-17449 Moderate

UBUNTU-CVE-2017-17449

The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4, when CONFIG_NLMON is enabled, does not restrict observations of Netlink messages to a single net namespace, which allows local users to obtain sensitive information by leveraging the CAP_NET_ADMIN capability to sniff an nlmon interface for all Netlink activity on the system.

Exploit probability Not scored
Published December 6, 2017
Required by Not available
Last source change April 22, 2026

02 / AFFECTED SOFTWARE

Affected packages

Ubuntu:14.04:LTS linux

131 explicit affected versions

Ubuntu:14.04:LTS linux-aws

9 explicit affected versions

Ubuntu:14.04:LTS linux-lts-xenial

49 explicit affected versions

Ubuntu:16.04:LTS linux

70 explicit affected versions

Ubuntu:16.04:LTS linux-aws

30 explicit affected versions

Ubuntu:16.04:LTS linux-azure

14 explicit affected versions

Ubuntu:16.04:LTS linux-gcp

13 explicit affected versions

Ubuntu:16.04:LTS linux-hwe

32 explicit affected versions

Ubuntu:16.04:LTS linux-kvm

10 explicit affected versions

Ubuntu:16.04:LTS linux-oem

11 explicit affected versions

Ubuntu:16.04:LTS linux-raspi2

44 explicit affected versions

Ubuntu:16.04:LTS linux-snapdragon

41 explicit affected versions

Ubuntu:20.04:LTS linux-azure-fde

26 explicit affected versions

Ubuntu:20.04:LTS linux-gke

51 explicit affected versions

Ubuntu:20.04:LTS linux-raspi2

6 explicit affected versions

Ubuntu:20.04:LTS linux-riscv

12 explicit affected versions

Ubuntu:22.04:LTS linux-intel-iot-realtime

1 explicit affected versions

Ubuntu:22.04:LTS linux-realtime

1 explicit affected versions

Ubuntu:22.04:LTS linux-riscv

23 explicit affected versions

Ubuntu:24.04:LTS linux-raspi-realtime

1 explicit affected versions

Ubuntu:Pro:FIPS:16.04:LTS linux-fips

3 explicit affected versions

03 / CONNECTIONS

Connected vulnerabilities

related USN-3653-1
related USN-3655-2
related USN-3657-1

04 / EVIDENCE

Source records

Open Source Vulnerabilities UBUNTU-CVE-2017-17449

The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4, when CONFIG_NLMON is enabled, does not restrict observations of Netlink messages to a single net namespace, which allows local users to obtain sensitive information by leveraging the CAP_NET_ADMIN capability to sniff an nlmon interface for all Netlink activity on the system.

View original source

05 / REFERENCES

Further evidence