What is CVE-2018-9439?

CVE-2018-9439 is a medium-severity vulnerability in Google Android, classified under Use After Free. CVSS score: 6.7/10. Published 2024-12-05.

How severe is CVE-2018-9439?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Use After Free in Google Android

CVE-2018-9439

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.

Vulnerability class: Use-After-Free

Published 2024-12-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (0.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 0th percentile — 0.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Google Android — versions Kernel

Weakness classification (CWE)

CWE-416 — Use After Free

References

source.android.com/security/bulletin/pixel/2018-08-01 (Vendor Advisory)

Frequently asked questions

What is CVE-2018-9439?: CVE-2018-9439 is a medium-severity vulnerability in Google Android, classified under Use After Free. CVSS score: 6.7/10. Published 2024-12-05.
How severe is CVE-2018-9439?: Medium severity. CVSS v3 base score is 6.7 out of 10.