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CVE-2025-9478

35
FAUCET Score

CVE-2025-9478 is a critical use-after-free vulnerability in ANGLE, affecting Google Chrome prior to version 139.0.7258.154, and consequently impacting products from Apple, Google, Linux, and Microsoft. This high-severity flaw (CVSS 8.8) allows a remote unauthenticated attacker to potentially achieve heap corruption by tricking a user into visiting a crafted HTML page. While no public exploit code or active exploitation is confirmed, the vulnerability has garnered significant community discussion and media coverage, indicating its potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
>= 139.0.7258.154, < 139.0.7258.154CPE match
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
< 139.0.7258.154CPE matchmatch criteria
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.49%
Probability of exploitation in next 30 days
EPSS Percentile
87.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0349 is in the 87th percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: Microsoft Edge (Chromium-based)Fixed in: 139.0.3405.125
googlevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2025-Aug/CVE-2025-9478

Chromium: CVE-2025-9478 Use after free in ANGLE

Aug 12, 2025

References

chromereleases.googleblog.com / 2025/08/stable-channel-update-for-desktop_26.html
Release NotesVendor Advisory
issues.chromium.org / issues/437825940
Issue TrackingPermissions Required