CVE-2023-3420
HighType Confusion in V8 in Google Chrome prior to 114.0.5735.198 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Published Jun 26, 2023 · Updated Aug 7, 2026 · Also known as DEBIAN-CVE-2023-3420, DSA-5440-1
Key Facts
Patch immediately- CVE-2023-3420 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Chrome (Google), Debian Linux, chromium (debian) and 4 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 56% probability of exploitation in the next 30 days.
- Fixed versions are available, including Chrome 114.0.5735.198, chromedriver 114.0.5735.198-1.1, chromedriver 114.0.5735.198-bp155.2.10.1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
56%
Higher than 99.0% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2023-3420 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Type Confusion in V8 in Google Chrome prior to 114.0.5735.198 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
Affected Products
28 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ChromeGoogle | >= 114.0.5735.198 | 114.0.5735.198 |
| Debian LinuxDebian | 11.0, 12.0 | n/a |
| chromiumdebian | See advisory | 114.0.5735.198-1~deb11u1 |
| chromedriversuse | See advisory | 114.0.5735.198-bp155.2.10.1 |
| operasuse | See advisory | 102.0.4880.40-lp154.2.50.1 |
Patched Releases
Chrome
114.0.5735.198
chromedriver
114.0.5735.198-1.1, 114.0.5735.198-bp155.2.10.1
chromium
114.0.5735.198-1, 114.0.5735.198-1.1, 114.0.5735.198-1~deb11u1, 114.0.5735.198-1~deb12u1, 114.0.5735.198-bp155.2.10.1
opera
102.0.4880.40-lp154.2.50.1
ungoogled-chromium
115.0.5790.102-1.1
ungoogled-chromium-chromedriver
115.0.5790.102-1.1
Timeline
Publicly disclosed
Jun 26, 2023
Last updated
Aug 7, 2026
Weakness Type
- CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
References
- advisoryhttps://chromereleases.googleblog.com/2023/06/stable-channel-update-for-desktop_26.html
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2023-3420
- advisoryhttps://www.debian.org/security/2023/dsa-5440
- otherhttps://crbug.com/1452137
- otherhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KREKCQTJDVI2AEBG5ECZPSOQXIC2L5XL/
FAQ
Common Questions.
Type Confusion in V8 in Google Chrome prior to 114.0.5735.198 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Affected: Chrome (Google) versions >= 114.0.5735.198; Debian Linux versions 11.0, 12.0; chromium (debian), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Chrome 114.0.5735.198, chromedriver 114.0.5735.198-1.1, chromedriver 114.0.5735.198-bp155.2.10.1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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