CVE-2026-85892: Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Edge

Q: How do I fix CVE-2026-85892?

edge chromium: upgrade to 152.0.4191.66. Exact commands for each OS are on this page.

Q: Is CVE-2026-85892 being exploited?

CVE-2026-85892 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-85892 affect?

CVE-2026-85892 affects edge chromium. Severity is high (CVSS 7.8). Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Edge (Chromium-based) allows an authorized attacker to elevate privileges locally.

Q: How urgent is CVE-2026-85892?

Priority 35/100. High severity; On your watchlist

Routine

HIGH 7.8WATCHLISTUPGRADE

CVE-2026-85892 is a high-severity flaw (CVSS 7.8) affecting edge chromium. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Edge (Chromium-based) allows an authorized attacker to elevate privileges locally.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-362
Published	2026-09-14
Last modified	2026-09-25

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-09-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-14 18:20 UTCPublished CVE record published
2026-09-25 20:45 UTCUpdated Record last modified

microsoft edge chromium UPGRADE

Affected: < 152.0.4191.66

Fixed in: 152.0.4191.66

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy edge-chromium || rpm -q edge-chromium || edge-chromium --version

2. UPGRADE to 152.0.4191.66 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade edge-chromium

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade edge-chromium

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-85892?

edge chromium: upgrade to 152.0.4191.66. Exact commands for each OS are on this page.

Is CVE-2026-85892 being exploited?

CVE-2026-85892 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-2026-85892 affect?

CVE-2026-85892 affects edge chromium. Severity is high (CVSS 7.8). Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Edge (Chromium-based) allows an authorized attacker to elevate privileges locally.

How urgent is CVE-2026-85892?

Priority 35/100. High severity; On your watchlist

Software pages

Microsoft Edge vulnerabilities · Chromium vulnerabilities

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References

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