Description
Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2.
Published: 2021-11-03
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-24953 Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2.
Ubuntu USN Ubuntu USN USN-5107-1 Firefox vulnerabilities
Ubuntu USN Ubuntu USN USN-5132-1 Thunderbird vulnerabilities
Ubuntu USN Ubuntu USN USN-5248-1 Thunderbird vulnerabilities
History

Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00334}

epss

{'score': 0.00388}


Subscriptions

Mozilla Firefox Firefox Esr Thunderbird
Redhat Enterprise Linux Rhel Eus
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2024-08-04T01:44:22.811Z

Reserved: 2021-08-10T00:00:00.000Z

Link: CVE-2021-38501

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-11-03T01:15:07.617

Modified: 2024-11-21T06:17:15.470

Link: CVE-2021-38501

cve-icon Redhat

Severity : Important

Publid Date: 2021-10-05T00:00:00Z

Links: CVE-2021-38501 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses