Description
During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.15, Thunderbird < 91.2, Firefox ESR < 91.2, Firefox ESR < 78.15, and Firefox < 93.
Published: 2021-11-03
Score: 8.8 High
EPSS: 1.1% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-2782-1 firefox-esr security update
Debian DLA Debian DLA DLA-2874-1 thunderbird security update
Debian DSA Debian DSA DSA-4981-1 firefox-esr security update
Debian DSA Debian DSA DSA-5034-1 thunderbird security update
EUVD EUVD EUVD-2021-24948 During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.15, Thunderbird < 91.2, Firefox ESR < 91.2, Firefox ESR < 78.15, and Firefox < 93.
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': 0.00949}

epss

{'score': 0.01429}


Subscriptions

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

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2024-08-04T01:44:23.406Z

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

Link: CVE-2021-38496

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-11-03T01:15:07.380

Modified: 2024-11-21T06:17:14.707

Link: CVE-2021-38496

cve-icon Redhat

Severity : Important

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

Links: CVE-2021-38496 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses