Google Chrome: Race condition in Fonts allows sandbox escape
Summary
Google Chrome prior to 155.0.8059.39 contains a race condition (CWE-362) in its Fonts component. A remote attacker who has already compromised the renderer process can execute arbitrary code outside the sandbox by luring a user to a crafted HTML page. The CVSS vector requires user interaction and high attack complexity, and the scope is changed.
Affected
- Google Chrome desktop prior to 155.0.8059.39
- Chromium-based distributions and packages built from the affected code (for example Debian, SUSE, Chainguard) until patched
Fixed in
- Google Chrome 155.0.8059.39 (Linux) and 155.0.8059.39/.40 (Windows, Mac) per the vendor release of 6 October 2026
- Later stable builds were released after this CVE; whether they list it was not confirmed.
- Debian: 155.0.8059.39-1~deb12u1 (bookworm)
- Microsoft Edge: fixed build per Tenable 155.0.4283.62 (unverified, check Microsoft advisory)
Workaround
- None identified. Applying the vendor update is the fix.
Exploitation
- No evidence of active exploitation found. CISA SSVC: Exploitation none, Automatable no, Technical Impact total.
- Not listed as known exploited (KEV) in the sources consulted.
- No public proof of concept confirmed.
Our recommendation
- Check the Chrome version on all endpoints (chrome://version) and update to the current stable build.
- Verify auto-update is enabled and enforced via policy (GPO or Intune).
- Patch other Chromium-based browsers (Edge, Brave and similar) and Linux distribution packages.
- Prioritise managed endpoints that lag behind on updates.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Chrome Releases: Stable Channel Update for Desktop chromereleases.googleblog.com
- Chromium issue tracker issues.chromium.org
- OSV: DEBIAN-CVE-2026-106377 osv.dev
- Malwarebytes: Update Chrome to fix critical security issues www.malwarebytes.com
- GHacks: Google releases Chrome 155 with 247 security fixes www.ghacks.net
- CISA ADP Vulnrichment (via HOL Guard) hol.org
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 14:05.
Original description (NVD)
Race condition in Fonts in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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