Vulnerability · Published Nov 14, 2025 · Assigned by Chrome
CVE-2025-9479
Medium 4.3
In plain English
A medium-severity out-of-bounds read in Chrome from Google. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.2%top 89.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Out of bounds read in V8 in Google Chrome prior to 133.0.6943.141 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Medium)
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | chromium | 134.0.6998.35-1~deb12u1 | DEBIAN-CVE-2025-9479 |
| Debian:12 | chromium | 134.0.6998.35-1~deb12u1 | DSA-5875-1 |
| Debian:13 | chromium | 133.0.6943.141-1 | DEBIAN-CVE-2025-9479 |
| Debian:14 | chromium | 133.0.6943.141-1 | DEBIAN-CVE-2025-9479 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L