CVE & CISA-KEV Catalog

CVE-2021-30555

HIGH

8.8

CVSS v3

Description

Use after free in Sharing in Google Chrome prior to 91.0.4472.114 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption via a crafted HTML page and user gesture.

CWE-416Use After Free

How to fix

Remediation Available

chromiumDebian

Fixed in:93.0.4577.82-1CVE-2021-30555

Fixed in:93.0.4577.82-1CVE-2021-30555

Fixed in:93.0.4577.82-1CVE-2021-30555

Fixed in:93.0.4577.82-1CVE-2021-30555

Google ChromeWindows application

Affected:91.0.4472.114Fixed in:91.0.4472.114Google LLC

Google Chrome (EXE)Windows application

Affected:91.0.4472.114Fixed in:91.0.4472.114Google LLC

Google Chrome BetaWindows application

Affected:91.0.4472.114Fixed in:91.0.4472.114Google LLC

Google Chrome Beta (EXE)Windows application

Affected:91.0.4472.114Fixed in:91.0.4472.114Google LLC

Google Chrome CanaryWindows application

Affected:91.0.4472.114Fixed in:91.0.4472.114Google LLC

Google Chrome DevWindows application

Affected:91.0.4472.114Fixed in:91.0.4472.114Google LLC

Google Chrome Dev (EXE)Windows application

Affected:91.0.4472.114Fixed in:91.0.4472.114Google LLC

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.35%probability of exploitation in 30 days

68thpercentile

Moderate risk: more likely to be exploited than 68% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory1

security.gentoo.org

Other references2

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	Fix

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Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.