High

Heap buffer overflow in Google Chrome WebAudio

IdentifiersCVE-2026-4673CWE-122· Heap-based Buffer Overflow

CVE-2026-4673 is a high-severity heap buffer overflow in the WebAudio component of Google Chrome. In Chrome versions prior to 146.0.7680.165, a remote attacker could trigger the flaw by causing a target to load a crafted HTML page, resulting in an out-of-bounds memory write. The issue is described by Google/Chromium as a heap buffer overflow in WebAudio and is classified as CWE-122. Publicly available details do not identify the specific vulnerable function, and Google restricted technical details while users updated.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an attacker to corrupt memory in the browser process via an out-of-bounds write. Based on the provided Chrome and Chromium context, this could lead to arbitrary code execution, browser compromise, denial of service, or potentially further compromise of the host depending on exploit chaining and runtime conditions. The supplied CVSS v3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) indicates high impact to confidentiality, integrity, and availability.

Mitigation

If you can’t patch tonight, do this now.

Apply the vendor update as the primary mitigation. Until patching is complete, reduce exposure by limiting access to untrusted or attacker-controlled websites, using browser isolation or sandboxing controls where available, and enforcing rapid browser restart after update deployment because Chrome protections do not become active until relaunch. Enterprise administrators should prioritize managed rollout to exposed user populations.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome to version 146.0.7680.165 or later. The provided context states that Google released fixes in Chrome 146.0.7680.164/165 for Windows and Mac and 146.0.7680.164 for Linux as part of the March 2026 stable-channel security update; however, the vulnerability description specifically states affected versions are those prior to 146.0.7680.165. Organizations should deploy the vendor-provided patched build through standard browser and enterprise patch-management processes and ensure browsers are restarted so the update takes effect.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

GoogleChromeapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

21 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

21 SOURCESView more in app

techrepublic com securityNews

Mar 27, 2026

Google Issues High-Risk Security Patch for 3.5 Billion Chrome Users

A high-severity heap buffer overflow vulnerability in Chrome's WebAudio component.

cyber security newsNews

Mar 24, 2026

Chrome Security Update Fixes 8 Vulnerabilities Allowing Remote Code Execution

A high-severity heap buffer overflow vulnerability in Chrome's WebAudio component.

cvefeed high severityNews

Mar 24, 2026

CVE-2026-4673 - Google Chrome Heap Buffer Overflow Vulnerability in WebAudio

A heap buffer overflow vulnerability in WebAudio in Google Chrome that allows a remote attacker to perform an out-of-bounds memory write via a crafted HTML page.

chrome releases blogNews

Mar 23, 2026

Chrome Releases: Stable Channel Update for Desktop

A high-severity heap buffer overflow vulnerability in Chrome WebAudio.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity15

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2026-4673

NVD

nvd.nist.gov/vuln/detail/CVE-2026-4673

MITRE CWE · CWE-122

Heap-based Buffer Overflow

Vendor Advisory

chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_23.html

Permissions Required

issues.chromium.org/issues/485397284