CVE-2025-1566: DNS Leak in Native System VPN in Google ChromeOS Dev Channel on ChromeOS 16002.23.0 allows network observers t

Routine

HIGH 7.5REMOTEMITIGATE

CVE-2025-1566 is a high-severity flaw (CVSS 7.5) affecting chrome os. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

DNS Leak in Native System VPN in Google ChromeOS Dev Channel on ChromeOS 16002.23.0 allows network observers to expose plaintext DNS queries via failure to properly tunnel DNS traffic during VPN state transitions.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 91%)
CISA exploited list	No
Weakness	CWE-1319
Published	2025-04-16
Last modified	2026-06-17

Publisher (CNA): ChromeOS · Vendor: google

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-04-16 23:15 UTCPublished CVE record published
2026-06-17 08:39 UTCUpdated Record last modified

google chrome os MITIGATE

Affected: 16002.23.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 16002.23.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-1566?

chrome os: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-1566 being exploited?

CVE-2025-1566 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-1566 affect?

CVE-2025-1566 affects chrome os. Severity is high (CVSS 7.5). DNS Leak in Native System VPN in Google ChromeOS Dev Channel on ChromeOS 16002.23.0 allows network observers to expose plaintext DNS queries via failure to properly tunnel DNS traffic during VPN state transitions.

How urgent is CVE-2025-1566?

Priority 34/100. High severity; Remotely exploitable, no login, no user action

Software pages

Google Chrome vulnerabilities

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References

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