What is CVE-2023-21218?

CVE-2023-21218 is a critical-severity vulnerability in Google Android. CVSS score: 9.8/10. Published 2023-12-04.

How severe is CVE-2023-21218?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Google Android

CVE-2023-21218

In PMRChangeSparseMemOSMem of physmem_osmem_linux.c, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege in the kernel with no additional execution privileges needed. User interaction is not needed for exploitation.

EPSS: 0.004 (33.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Google Android — versions Android SoC

References

security@android.com (Vendor Advisory)

Frequently asked questions

What is CVE-2023-21218?: CVE-2023-21218 is a critical-severity vulnerability in Google Android. CVSS score: 9.8/10. Published 2023-12-04.
How severe is CVE-2023-21218?: Critical severity. CVSS v3 base score is 9.8 out of 10.