CVE-2017-5121

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-10-27 · updated 2026-06-17
Weakness: CWE-20

Description

Inappropriate use of JIT optimisation in V8 in Google Chrome prior to 61.0.3163.100 for Linux, Windows, and Mac allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page, related to the escape analysis phase.

Affected products

Debian Linux: 9.0, 10.0
Google Chrome: before 61.0.3163.100 — fixed in 61.0.3163.100
RedHat Enterprise Linux Desktop: 6.0
RedHat Enterprise Linux Server: 6.0
RedHat Enterprise Linux Workstation: 6.0

How to fix

Upgrade to a fixed version: Google Chrome 61.0.3163.100. Check the vendor advisory for mitigations.

References

http://www.debian.org/security/2017/dsa-3985
http://www.securityfocus.com/bid/100947
http://www.securitytracker.com/id/1039497
https://access.redhat.com/errata/RHSA-2017:2792
https://blogs.technet.microsoft.com/mmpc/2017/10/18/browser-security-beyond-sandboxing/
https://chromereleases.googleblog.com/2017/09/stable-channel-update-for-desktop_21.html
https://crbug.com/765433
https://security.gentoo.org/glsa/201709-25
http://www.debian.org/security/2017/dsa-3985
http://www.securityfocus.com/bid/100947
http://www.securitytracker.com/id/1039497
https://access.redhat.com/errata/RHSA-2017:2792

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