CVE-2026-17848: Google Chrome RCE Vulnerability

CVE-2026-17848 Overview

CVE-2026-17848 is an integer overflow vulnerability in the Codecs component of Google Chrome versions prior to 151.0.7922.72. A remote attacker can potentially perform a sandbox escape by delivering a crafted video file to a target browser. Chromium classifies the security severity as Medium. The flaw is tracked under CWE-20: Improper Input Validation and affects the media processing path where untrusted video data is parsed and decoded.

Critical Impact
Successful exploitation can allow an attacker to escape the Chrome renderer sandbox through a crafted video file, expanding the attack surface beyond the tab context.

Affected Products

Google Chrome versions prior to 151.0.7922.72
Chromium-based browsers incorporating the affected codec code
Desktop Chrome Stable channel releases before the update

Discovery Timeline

2026-07-30 - CVE-2026-17848 published to NVD
2026-07-30 - Last updated in NVD database

Technical Details for CVE-2026-17848

Vulnerability Analysis

The vulnerability resides in the Codecs subsystem of Chrome, which handles decoding of video streams. An integer overflow occurs when the codec logic computes buffer sizes or offsets using attacker-controlled values from a crafted video container. When the computed value wraps around, subsequent memory operations can reference undersized or incorrectly bounded buffers.

Because the codec pipeline runs across the renderer and GPU processes, a controlled memory corruption primitive at this layer can be chained toward a sandbox escape. The advisory explicitly notes potential sandbox escape via a crafted video file, indicating the flaw provides more than an in-tab crash. See the Chromium Issue Tracker Entry for tracking details.

Root Cause

The root cause is improper validation of numeric fields used during codec buffer sizing, consistent with [CWE-20]. Arithmetic on untrusted 32-bit values produces an overflowed result that bypasses sanity checks, leading to out-of-bounds access during video frame processing.

Attack Vector

An attacker hosts or delivers a crafted video file that Chrome parses through the vulnerable codec path. Delivery vectors include malicious web pages, embedded media in third-party sites, or advertising content. User interaction is limited to visiting or loading the media resource in an affected Chrome build.

No public proof-of-concept has been referenced in the advisory. Technical details are limited to the Google Chrome Update Announcement.

Detection Methods for CVE-2026-17848

Indicators of Compromise

Unexpected Chrome renderer or GPU process crashes coinciding with video playback on untrusted sites
Child processes of chrome.exe spawning shells, script interpreters, or performing file system writes outside the profile directory
Outbound network connections initiated by Chrome utility processes to unfamiliar hosts following media load events

Detection Strategies

Inventory Chrome versions across managed endpoints and flag any build below 151.0.7922.72
Alert on anomalous process lineage where Chrome utility or GPU processes launch non-browser binaries
Correlate browser crash telemetry with web navigation logs to identify repeat exposure to a specific media URL

Monitoring Recommendations

Ingest Chrome crash reports and endpoint process telemetry into a central analytics platform for correlation
Monitor proxy and DNS logs for delivery of video files from low-reputation domains referenced by internal browsing
Track version drift on Chrome installations and trigger remediation workflows when out-of-date builds appear

How to Mitigate CVE-2026-17848

Immediate Actions Required

Update Google Chrome to version 151.0.7922.72 or later on all managed endpoints
Restart Chrome after update deployment to ensure the patched binary is loaded into memory
Audit Chromium-based browsers and embedded WebViews for downstream releases that incorporate the fix

Patch Information

Google addressed the issue in Chrome Stable 151.0.7922.72. Deployment details are published in the Google Chrome Update Announcement. Enterprise administrators should push the update through existing management channels such as Chrome Browser Cloud Management or endpoint software distribution tools.

Workarounds

Restrict access to untrusted media content through web proxy category filtering until patching completes
Enforce Site Isolation and keep the Chrome sandbox enabled; do not deploy --no-sandbox flags
Apply group policy to force automatic Chrome updates and prevent users from deferring browser restarts

bash

# Verify Chrome version on Windows endpoints
reg query "HKLM\Software\Google\Update\Clients\{8A69D345-D564-463C-AFF1-A69D9E530F96}" /v pv

# Verify Chrome version on Linux endpoints
google-chrome --version

# Enforce auto-update via Chrome policy (Linux example)
cat <<EOF > /etc/opt/chrome/policies/managed/auto_update.json
{
  "UpdateDefault": 1,
  "AutoUpdateCheckPeriodMinutes": 60
}
EOF