CVE-2023-6345: Google Skia Integer Overflow Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 30 Nov 2023, 1 day after the CVE record was published.

How likely is exploitation in the next 30 days?

16.5%

EPSS score, percentile 97 of all scored records

How severe?

9.6 Critical

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

Required action (CISA), due 21 Dec 2023: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected: 119.0.6045.199 up to, not including, 119.0.6045.199

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 21 December 2023.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

• https://chromereleases.googleblog.com/2023/11/stable-channel-update-for-desktop_28.html
• https://nvd.nist.gov/vuln/detail/CVE-2023-6345

Affected products and versions

As listed in the CVE record.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Google Chromium Skia contains an integer overflow vulnerability that allows a remote attacker, who has compromised the renderer process, to potentially perform a sandbox escape via a malicious file. This vulnerability affects Google Chrome and ChromeOS, Android, Flutter, and possibly other products.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2023-6345 to its Known Exploited Vulnerabilities (KEV) catalog on 30 Nov 2023.
• CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
• The due date CISA sets for the required action is 21 Dec 2023.
• The CVE record was published on 29 Nov 2023, 1 day before it was added to KEV.
• The CVE record carries a CVSS v3.1 base score of 9.6 (Critical), taken from CISA's enrichment of the record.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 16.5% (percentile 97), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

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)

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

• CWE-190: Integer Overflow or Wraparound

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

References

• chromereleases.googleblog.com
• crbug.com
• lists.fedoraproject.org
• lists.fedoraproject.org
• debian.org
• lists.fedoraproject.org
• security.gentoo.org

More exploited Google vulnerabilities

• CVE-2026-111497: Google Brotli Unchecked Return Value Vulnerability (added 27 Oct 2026)
• CVE-2026-58704: Google Pixel Improper Authorization Vulnerability (added 16 Sep 2026)
• CVE-2026-87491: Google Chromium V8 Out of Bounds Write Vulnerability (added 9 Sep 2026)
• CVE-2026-85046: Google Chromium V8 Type Confusion Vulnerability (added 4 Sep 2026)
• CVE-2026-11645: Google Chromium V8 Out-of-Bounds Read and Write Vulnerability (added 9 Jun 2026)
• CVE-2026-5281: Google Dawn Use-After-Free Vulnerability (added 1 Apr 2026)