CVE-2026-7975 Overview
CVE-2026-7975 is a use-after-free vulnerability [CWE-416] in the DevTools component of Google Chrome versions prior to 148.0.7778.96. A remote attacker who has already compromised the renderer process can leverage a crafted HTML page to potentially escape the Chrome sandbox. Sandbox escapes break a primary security boundary in Chrome, allowing code that should be confined to the renderer to interact with higher-privileged browser processes. The flaw affects Chrome on Windows, macOS, and Linux. Google addressed the issue through the stable channel desktop update tracked in the Chrome Releases blog.
Critical Impact
Successful exploitation enables a sandbox escape from a compromised renderer, expanding attacker access from web content to the host browser process.
Affected Products
- Google Chrome prior to 148.0.7778.96
- Chrome on Microsoft Windows
- Chrome on Apple macOS and Linux
Discovery Timeline
- 2026-05-06 - CVE-2026-7975 published to NVD
- 2026-05-06 - Last updated in NVD database
Technical Details for CVE-2026-7975
Vulnerability Analysis
The vulnerability is a use-after-free condition inside Chrome's DevTools subsystem. DevTools provides debugging and inspection capabilities and communicates with the renderer through the Chrome DevTools Protocol. When an object backing a DevTools operation is freed but a dangling pointer remains accessible, subsequent access reads or writes memory that may now hold attacker-controlled data. The Chromium project rated the underlying issue as Medium severity, while NVD assigns the CVE a higher score because the scope changes when a sandboxed renderer breaches the browser process boundary. Additional context is available in the Chromium Issue Tracker entry.
Root Cause
The root cause is improper object lifetime management in DevTools code paths [CWE-416]. A reference to a heap object persists after the object's destructor runs, allowing later code to operate on freed memory. Attackers groom the heap so the freed slot is reclaimed by a controlled object, turning the dangling pointer into a type confusion or arbitrary read/write primitive.
Attack Vector
Exploitation requires two stages. First, the attacker must already control the renderer process, typically through a separate renderer bug triggered by a crafted HTML page. Second, the attacker drives DevTools-related logic into the use-after-free window to corrupt memory in a more privileged process and complete the sandbox escape. User interaction is required, and attack complexity is high because reliable exploitation depends on heap layout and timing.
No public proof-of-concept or in-the-wild exploitation has been reported for CVE-2026-7975 at the time of publication. The vulnerability is not listed on the CISA Known Exploited Vulnerabilities catalog.
Detection Methods for CVE-2026-7975
Indicators of Compromise
- Chrome renderer or browser processes terminating with access violation or heap corruption signatures shortly after visiting an untrusted page.
- Unexpected child processes spawned by chrome.exe or the Chrome helper processes following web browsing activity.
- Outbound network connections from Chrome browser processes to attacker-controlled infrastructure not associated with normal browsing.
Detection Strategies
- Inventory Chrome installations across the fleet and flag versions earlier than 148.0.7778.96 for prioritized remediation.
- Monitor for crash telemetry from Chrome that maps to DevTools components, since exploitation attempts often produce instability before succeeding.
- Correlate browser process anomalies with file writes, persistence creation, or credential access activity that would follow a successful sandbox escape.
Monitoring Recommendations
- Enable endpoint logging for process creation, image loads, and network connections originating from Chrome processes.
- Track DevTools usage in managed environments through enterprise policy reporting where possible.
- Alert on Chrome browser processes performing actions outside normal browsing patterns, such as accessing LSASS or writing to startup locations.
How to Mitigate CVE-2026-7975
Immediate Actions Required
- Update Google Chrome to version 148.0.7778.96 or later on all Windows, macOS, and Linux endpoints.
- Restart Chrome after the update to ensure the patched binaries are loaded into running sessions.
- Verify Chromium-based enterprise builds and embedded WebView components inherit the fix from upstream.
Patch Information
Google released the fix in the stable channel desktop update for Chrome 148.0.7778.96. Deployment details and the full list of bug fixes in the release are documented in the Stable Channel Update for Desktop advisory. Administrators using Chrome Browser Cloud Management or group policy should confirm the rollout has reached all managed devices.
Workarounds
- Restrict access to untrusted web content using site isolation policies and enterprise URL allowlists until patching completes.
- Disable or restrict DevTools in managed environments using the DeveloperToolsAvailability enterprise policy where business requirements allow.
- Apply defense-in-depth controls such as application allowlisting and least-privilege user accounts to limit post-exploit impact.
# Configuration example: enforce DevTools restriction via Chrome enterprise policy (Windows registry)
reg add "HKLM\Software\Policies\Google\Chrome" /v DeveloperToolsAvailability /t REG_DWORD /d 2 /f
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
