In TBD of fvp.c, there is a possible way to glitch CPU behavior due to a missing permission check.

published 2021-12-15 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-25996

cvss: 6.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits: 0; none known

In TBD of fvp.c, there is a possible way to glitch CPU behavior due to a missing permission check. This could lead to local escalation of privilege with physical access to device internals with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-198291476References: N/A

Patch / fix

links 1

source.android.com/security/bulletin/pixel/2021-12-01 advisory

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.8	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.2	AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

n/a Android

Classification

Weakness

CWE-862 Missing Authorization

References

source.android.com /security/bulletin/pixel/2021-12-01
patch, vendor-advisory

Sources

CVE List CVE-2021-39639
NVD CVE-2021-39639

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary