CVE-2023-5856

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-11-01 · updated 2026-06-17
Weakness: CWE-416

Description

Use after free in Side Panel in Google Chrome prior to 119.0.6045.105 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Medium)

Affected products

Debian Linux: 11.0, 12.0
Fedoraproject Fedora: 37, 38, 39
Google Chrome: before 119.0.6045.105 — fixed in 119.0.6045.105

How to fix

Upgrade to a fixed version: Google Chrome 119.0.6045.105. Check the vendor advisory for mitigations.

References

https://chromereleases.googleblog.com/2023/10/stable-channel-update-for-desktop_31.html
https://crbug.com/1493380
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2MHLJRFWZNY6BFOW25Q4FEESVWZKS4C2/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EBA4KD5ZSV6XWWFLVR5UBYKKNOYMH33H/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PHWLT3M2AQDFD7RNAM3NJMYUC5KHMO5V/
https://security.gentoo.org/glsa/202311-11
https://security.gentoo.org/glsa/202312-07
https://security.gentoo.org/glsa/202401-34
https://www.debian.org/security/2023/dsa-5546
https://chromereleases.googleblog.com/2023/10/stable-channel-update-for-desktop_31.html
https://crbug.com/1493380
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2MHLJRFWZNY6BFOW25Q4FEESVWZKS4C2/

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