What is CVE-2026-6921?

CVE-2026-6921 is a high-severity vulnerability in Google Android, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.3/10. Published 2026-04-23.

How severe is CVE-2026-6921?

High severity. CVSS v3 base score is 8.3 out of 10.

Vulnerability in Google Android

CVE-2026-6921

Race in GPU in Google Chrome on Windows prior to 147.0.7727.117 allowed a remote attacker to potentially perform a sandbox escape via a crafted video file. (Chromium security severity: Medium)

Vulnerability class: Race Condition

Published 2026-04-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (11.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop_22.html (Release Notes)
issues.chromium.org/issues/493315759 (Permissions Required, Vendor Advisory)

Frequently asked questions

What is CVE-2026-6921?: CVE-2026-6921 is a high-severity vulnerability in Google Android, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.3/10. Published 2026-04-23.
How severe is CVE-2026-6921?: High severity. CVSS v3 base score is 8.3 out of 10.