CVE-2021-21206

high KEV

Published 2021-11-03 · Modified 2021-11-03

CVSS v3

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CVSS v2

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VIR risk

9.5

Description

Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

CISA KEV

Vendor: Google
Product: Chromium Blink
Due date: 2021-11-17

Predictions

Exploit likelihood

99%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: cisa-kev — https://nvd.nist.gov/vuln/detail/CVE-2021-21206

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-21206

Exploits

OS impact

OS	Version	Status	Fixed in
arch		fixed	`3.7.2218.55-1`
debian	bookworm	fixed	`90.0.4430.72-1`
debian	bullseye	fixed	`90.0.4430.72-1`
debian	forky	fixed	`90.0.4430.72-1`
debian	sid	fixed	`90.0.4430.72-1`
debian	trixie	fixed	`90.0.4430.72-1`

References

Verify integrity in audit chain (admin only). AS-IS.