Google Chrome: Buffer overflow in PDFium allows code execution in sandbox
Summary
Google Chrome desktop before 155.0.8059.79 contains a buffer overflow in PDFium, Chrome's built-in PDF component. A remote attacker can execute arbitrary code inside the browser sandbox by luring a user to a crafted HTML page. The CVSS score is 8.8 (High), and the sources do not state whether a separate sandbox escape is needed for full system compromise.
Affected
- Google Chrome desktop before 155.0.8059.79 (per CNA description)
- VulDB lists an older range up to 155.0.8059.39; the exact range is unclear
- Android: sources differ between 155.0.8059.79 and 155.0.8059.84
- Debian bookworm before 155.0.8059.79-1~deb12u1
- Ubuntu: chromium-browser is a wrapper for the Chromium snap, which must be checked
Fixed in
- Windows and Mac: 155.0.8059.79/.80
- Linux: 155.0.8059.79
- Debian bookworm: 155.0.8059.79-1~deb12u1
- Ubuntu snap: fixed version unknown
Workaround
Unknown. No vendor-documented mitigation was found; apply the update.
Exploitation
- No exploitation in the wild reported in the sources reviewed; verify against Google's post
- Not listed in CISA KEV (per a GitHub alert)
- EPSS differs between sources (0.24% and 0.339%)
- No public proof-of-concept found
Our recommendation
- Update Chrome to 155.0.8059.79 or later on all desktop and Android devices, including Linux.
- Force browser restarts on managed devices, because an open session keeps the old code loaded.
- Check Chromium-based packages (Debian, Ubuntu snap) and other Chromium-based browsers in use.
- Re-check KEV and PoC status in a few days.
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
- Ubuntu CVE tracker ubuntu.com
- OSV: Debian CVE record osv.dev
- Malwarebytes: Chrome 155 security update www.malwarebytes.com
- VulnCheck/Vulners: CVE-2026-110155 vulners.com
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 31 Oct 2026, 17:03.
Original description (NVD)
Buffer overflow in PDFium in Google Chrome prior to 155.0.8059.79 allowed a remote attacker to execute arbitrary code inside 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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