CVE-2021-21157
Use after free in Web Sockets in Google Chrome on Linux prior to 88.0.4324.182 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (9.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Use after free in Web Sockets in Google Chrome on Linux prior to 88.0.4324.182 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 9.46% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- microsoft/edge · microsoft/edge chromium · fedoraproject/fedora · google/chrome
- Source
- chrome-cve-admin@google.com
EPSS 9.5% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://chromereleases.googleblog.com/2021/02/stable-channel-update-for-desktop_16.htmlRelease Notes, Vendor Advisory
- https://crbug.com/1170657Exploit, Issue Tracking, Patch, Permissions Required, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BI6ZIJQYP5DFMYVX4J5OGOU2NQLEZ3SB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FE5SIKEVYTMDCC5OSXGOM2KRPYLHYMQX/
- https://security.gentoo.org/glsa/202104-08Third Party Advisory
- https://chromereleases.googleblog.com/2021/02/stable-channel-update-for-desktop_16.htmlRelease Notes, Vendor Advisory
- https://crbug.com/1170657Exploit, Issue Tracking, Patch, Permissions Required, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BI6ZIJQYP5DFMYVX4J5OGOU2NQLEZ3SB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FE5SIKEVYTMDCC5OSXGOM2KRPYLHYMQX/
- https://security.gentoo.org/glsa/202104-08Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.