CVE-2021-23965 - Mozilla developers reported memory safety bugs present in Firefox 84

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HIGH

Mozilla developers reported memory safety bugs present in Firefox 84

Published Feb 26, 2021

8.8

HIGH

CVSS 3.1

EPSS 0.97%

Description

Mozilla developers reported memory safety bugs present in Firefox 84. 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 < 85.

Affected products

Vendor Mozilla Product Firefox Default
n/a
- Version
  < 85
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Mozilla

Firefox

n/a

Version	Status	Constraints
< 85	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-787

Out-of-bounds Write

References (2)

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1670378%2C1673555%2C1676812%2C1678582%2C1684497
x_refsource_MISCExploitIssue TrackingPatchVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-03/
x_refsource_MISCRelease NotesVendor Advisory

Link	Providers	Tags
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1670378%2C1673555%2C1676812%2C1678582%2C1684497		x_refsource_MISCExploitIssue TrackingPatchVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-03/		x_refsource_MISCRelease NotesVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mozilla

Published Feb 26, 2021

Updated Aug 3, 2024

Reserved Jan 13, 2021

Link CVE-2021-23965

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2021-23965

Red Hat

Severity n/a

Public date n/a

Links CVE-2021-23965