CVE-2018-9439

Name: CVE-2018-9439
Creator: NVD / NIST
Published: 2024-12-05T00:15:18.337+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.7/10EPSS 0.08%

Last modified Jun 17, 2026

CVE-2018-9439 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. In __unregister_prot_hook and packet_release of af_packet.c, there is a possible use-after-free due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. EPSS estimates a 0.08% chance of exploitation in the next 30 days.

Description

In __unregister_prot_hook and packet_release of af_packet.c, there is a possible use-after-free due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. User interaction is not needed for exploitation.

Metrics

CVSS 3.1

6.7/10

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.08%

0.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Google	Android	All versions

References

https://source.android.com/security/bulletin/pixel/2018-08-01Vendor Advisory

Timeline

Published: Dec 5, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2018-9439?

How severe is CVE-2018-9439?

CVE-2018-9439 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.08% probability of exploitation in the next 30 days.

How do I fix CVE-2018-9439?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-9439?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST