# What is CVE-2023-6345?

> CVE-2023-6345 is a critical-severity flaw (CVSS 9.6) in Chrome from Google, published on 29 November 2023. It is on the list of flaws known to be exploited, so criminals are already using it. The latest forecast puts its chance of use in the next 30 days at 16%. If you run an affected version, patch it first.

Canonical page: https://www.edgeprotect.io/what-is/cve-2023-6345

## At a glance

- **Verdict:** Fix this now. Attackers are using this flaw today. If you run an affected version, it goes to the top of your list.
- **EdgeProtect risk score:** 89 out of 100 (Critical); action: Emergency patch. Kept up to date as the evidence changes.
- **Severity:** Critical (CVSS 9.6 out of 10)
- **Known to be exploited:** Yes, it is on the government list of flaws known to be exploited
- **Chance of use in the next 30 days:** 16% (latest exploit-likelihood forecast)
- **Published:** 29 November 2023
- **Record last updated:** 10 March 2025
- **Main product:** Chrome from Google
- **Affected products:** 4

## What is CVE-2023-6345? In plain terms

It can be attacked from anywhere on the internet without logging in, but a person has to take an action first. If it works, the attacker can read data, change data and take it offline.

### The official 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)

### What kind of flaw is it?

- CWE-190: Integer Overflow or Wraparound

### How an attack on it works

- Where an attacker can be: Anywhere on the internet
- How hard it is to pull off: Easy: no special conditions
- Login needed first: No login needed
- Does someone have to click: Yes, a person has to take an action
- What an attacker gets: Can read data, change data and take it offline

Severity vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`

## Is CVE-2023-6345 being exploited? Yes

Attackers are already using it. It is on the government list of flaws known to be exploited, and the latest forecast puts the chance of it being used in the next 30 days at 16%.

Exploit likelihood over the last 7 days: 16%, 16%, 16%, 16%, 16%, 16%, 16%.

### Timeline

- 29 November 2023: Published
- 10 March 2025: Record last updated
- 11 June 2025: Exploit likelihood fell
- 19 November 2025: Exploit likelihood jumped

### How EdgeProtect ranks it

CVE-2023-6345 scores **89 out of 100 (Critical)**, with the action "Emergency patch".

Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less:

- Evidence it is being exploited: biggest factor
- How severe it is: strong factor
- How widely exposed it is: key context
- Real threat activity around it: key context

85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it.

## Who is affected by CVE-2023-6345?

The published record lists 4 products. Versions are as published: "before 119.0.6045.199" means every version up to, but not including, 119.0.6045.199.

- [Chrome](https://www.edgeprotect.io/product/google/chrome) by [Google](https://www.edgeprotect.io/vendors/google) (Application): before 119.0.6045.199
- [Fedora](https://www.edgeprotect.io/product/fedoraproject/fedora) by [Fedoraproject](https://www.edgeprotect.io/vendors/fedoraproject) (Operating system): 37, 38, 39
- [Debian Linux](https://www.edgeprotect.io/product/debian/debian_linux) by [Debian](https://www.edgeprotect.io/vendors/debian) (Operating system): 11.0, 12.0
- [Edge Chromium](https://www.edgeprotect.io/product/microsoft/edge_chromium) by [Microsoft](https://www.edgeprotect.io/vendors/microsoft) (Application): before 119.0.2151.97

## How do I fix CVE-2023-6345?

1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? EdgeProtect can work it out from your public website, or you can pick it from a list.
2. **Apply the vendor’s fix.** Install the latest update from the vendor. The references list where the vendor has published details.
3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
4. **Check it wasn’t used before you patched.** Because criminals are already using this flaw, look for signs of a break-in on affected systems using the vendor’s guidance.

### References

- [chromereleases.googleblog.com](https://chromereleases.googleblog.com/2023/11/stable-channel-update-for-desktop_28.html) (Release notes)
- [crbug.com](https://crbug.com/1505053) (Permissions required)
- [lists.fedoraproject.org](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T7ABNYMOI4ZHVCSPCNP7HQTOLGF53A2/) (Mailing list)
- [lists.fedoraproject.org](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/C7XQNYZZA3X2LBJF57ZHKXWOMJKNLZYR/) (Mailing list)
- [lists.fedoraproject.org](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJROPNKWW65R34J4IYGTJ7A3OBPUL4IQ/) (Mailing list)
- [security.gentoo.org](https://security.gentoo.org/glsa/202401-34) (Third-party advisory)
- [debian.org](https://www.debian.org/security/2023/dsa-5569) (Mailing list)

## Questions

### What is CVE-2023-6345?

CVE-2023-6345 is a critical-severity flaw in Chrome from Google, published on 29 November 2023. It can be attacked from anywhere on the internet without logging in, but a person has to take an action first. If it works, the attacker can read data, change data and take it offline.

### How serious is CVE-2023-6345?

It scores 9.6 out of 10 on the CVSS severity scale, which is critical. Our risk score for CVE-2023-6345 is 89 out of 100, which is Critical. Its action is "Emergency patch". Attackers are using this flaw today. If you run an affected version, it goes to the top of your list.

### Is CVE-2023-6345 being exploited?

Attackers are already using it. It is on the government list of flaws known to be exploited, and the latest forecast puts the chance of it being used in the next 30 days at 16%.

### Which versions does CVE-2023-6345 affect?

For Chrome from Google: before 119.0.6045.199. The record lists 4 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2023-6345?

Install the update the vendor names in its advisory. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet. Because criminals are already using it, also check affected systems for signs of a break-in.

## Does CVE-2023-6345 affect you?

EdgeProtect keeps checking for you:

- **Tell us what you run.** Pick your software from a list, or let us work it out from your website.
- **We match it to every flaw.** Over 400,000 published flaws, checked against your list.
- **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it.
- **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools.

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