How severe is CVE-2023-6345?

CVE-2023-6345 has a CVSS score of 9.6/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2023-6345?

Affected package information for CVE-2023-6345 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2023-6345?

No fixed version has been published for CVE-2023-6345 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2023-6345 actively exploited in the wild?

Yes. There are 3 known exploit references for CVE-2023-6345, including 3 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2023-6345?

CVE-2023-6345 has an EPSS (Exploit Prediction Scoring System) score of 1.9%, placing it in the 84th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

Is CVE-2023-6345 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2023-6345 (Google Skia Integer Overflow Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2023-11-30. CISA required all US federal civilian agencies to remediate this vulnerability by 2023-12-21. The required action was: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

When was CVE-2023-6345 published, and has it been updated?

CVE-2023-6345 was published on November 29, 2023 and was last updated on March 15, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2023-11-30 — agencies required to remediate by 2023-12-21

CVE-2023-6345

CRITICAL

Published

Nov 29, 2023

Updated

Mar 15, 2026

Affected

0 pkgs

Patched

None yet

Exploits

3 known

EPSS Exploitation Probability

via FIRST.org ↗

1.9%probability of exploitation in next 30 days

Lower Risk84th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

Integer overflow in Skia in Google Chrome prior to 119.0.6045.199 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a malicious file. (Chromium security severity: High)

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Integer overflow in Skia in Google Chrome prior to 119.0.6045.199 allowe…

chromereleases.googleblog.comChromeNov 2023

Integer overflow in Skia in Google Chrome prior to 119.0.6045.199 allowe…

cisa.govCISANov 2023

Integer overflow in Skia in Google Chrome prior to 119.0.6045.199 allowe…

chromereleases.googleblog.comGoogle-sheetNov 2023

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2023-6345 in your stack?

O3 detects CVE-2023-6345 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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