TI-2022-06996 Aliases CVE-2022-22746 GHSA-4fpj-fh6q-hx4r

Race condition in Mozilla Firefox ESR

MEDIUM 60CWE-362Published 2022-12-22 · Updated 2025-04-16

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: None · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

A race condition could have allowed bypassing the fullscreen notification which could have lead to a fullscreen window spoof being unnoticed.<br>*This bug only affects Firefox for Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00624 50th percentileScored 2026-11-07

Fix Fixed Firefox ESR (Mozilla): 91.5Firefox (Mozilla): 96+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Mozilla	Firefox ESR	before 91.5	91.5	Patch available	CNA
Mozilla	Firefox	before 96	96	Patch available	CNA
Mozilla	Thunderbird	before 91.5	91.5	Patch available	CNA

Firefox ESR VendorMozilla Affected before 91.5 Fixed in 91.5 Patch available CNA
Firefox VendorMozilla Affected before 96 Fixed in 96 Patch available CNA
Thunderbird VendorMozilla Affected before 91.5 Fixed in 91.5 Patch available CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:firefox::::::::	before 96.0	Vulnerable	Mozilla
cpe:2.3:a:mozilla:firefox_esr::::::::	before 91.5	Vulnerable	Mozilla
cpe:2.3:a:mozilla:thunderbird::::::::	before 91.5	Vulnerable	Mozilla
cpe:2.3:o:microsoft:windows:-:::::::*	not specified by NVD	Running on	Microsoft

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 96.0 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 91.5 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 91.5 Vulnerable ·Mozilla
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

Fix · CNA Firefox ESR (Mozilla) Fixed in 91.5
Fix · CNA Firefox (Mozilla) Fixed in 96
Fix · CNA Thunderbird (Mozilla) Fixed in 91.5

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2022-12-22
Mozilla Firefox 96
19 records Highest priority Priority HIGH 5 HIGH, 6 MEDIUM, 8 LOW
Other records, highest priority first
- TI-2021-03015 XML injection in Mozilla Firefox ESRPriority HIGH 82
- TI-2022-07013 Race condition in Mozilla FirefoxPriority HIGH 73
- TI-2022-06988 Out-of-bounds write in Mozilla Firefox ESRPriority HIGH 73
Show all 19 records →
Release · 2022-12-22
Mozilla Firefox ESR, Thunderbird 91.5
14 records Highest priority Priority HIGH 3 HIGH, 5 MEDIUM, 6 LOW
Other records, highest priority first
- TI-2021-03015 XML injection in Mozilla Firefox ESRPriority HIGH 82
- TI-2022-06988 Out-of-bounds write in Mozilla Firefox ESRPriority HIGH 73
- TI-2022-06987 Race condition in Mozilla Firefox ESRPriority HIGH 68
Show all 14 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 3 products

Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8

Timeline

2026-10-02 Threatist record created from CVE-2022-22746
2026-10-03 Alias added: GHSA-4fpj-fh6q-hx4r
2026-11-04 EPSS moved to the 50th–90th percentile

References

Advisory 3

Other 1

https://bugzilla.mozilla.org/show_bug.cgi?id=1735071

TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8

See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences