Chrome 155 Patches 247 Flaws — Including 4 Critical Use-After-Free Bugs
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Google's Chrome 155 release patched an unusually large number of vulnerabilities — 247 in total — including four critical use-after-free flaws affecting core browser components such as Chromecast, Navigation, and Track. Use-after-free vulnerabilities are particularly dangerous because attackers can exploit them to execute arbitrary code or escalate privileges, often silently. The scale of this release highlights how rapidly browser attack surfaces grow, and how even widely-used, well-resourced software can accumulate critical flaws between update cycles. Organizations that delay browser updates, or lack visibility into which browser versions are deployed across endpoints, remain exposed to exploitation of these known, patched vulnerabilities.
Tactical Insight
Immediate actions
- Update all endpoints to Chrome 155 or later immediately, prioritizing internet-facing and privileged user machines.
- Audit your endpoint management inventory to identify any devices still running outdated Chrome versions.
Long-term improvements
- Enable auto-update policies for browsers enterprise-wide via Group Policy, Intune, or a comparable endpoint management platform.
- Establish a formal patch SLA (e.g., critical patches applied within 24–72 hours) and track compliance metrics.
- Implement browser version allowlisting so only approved, current versions can run on managed endpoints.
Detection measures
- Deploy vulnerability scanning tools (e.g., Tenable, Qualys) to continuously detect outdated browser versions across all assets.
- Configure SIEM alerts to flag endpoints reporting browser versions below the current approved baseline.