TI-2022-13643 Aliases CVE-2022-31747 GHSA-82mc-w667-c9g9

Memory corruption in Mozilla Thunderbird

MEDIUM 51CWE-119Published 2022-12-22 · Updated 2025-04-15

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Partial Red Hat: 11 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.

Summary

Mozilla developers Andrew McCreight, Nicolas B. Pierron, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 100 and Firefox ESR 91.9. 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 Thunderbird < 91.10, Firefox < 101, and Firefox ESR < 91.10.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00936 61st percentileScored 2026-11-07

Fix Partial Thunderbird (Mozilla): 91.10Firefox (Mozilla): 101+1 more productRed Hat: 12 advisoriesRed Hat: 11 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

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	Thunderbird	before 91.10	91.10	Patch available	CNA
Mozilla	Firefox	before 101	101	Patch available	CNA
Mozilla	Firefox ESR	before 91.10	91.10	Patch available	CNA

Thunderbird VendorMozilla Affected before 91.10 Fixed in 91.10 Patch available CNA
Firefox VendorMozilla Affected before 101 Fixed in 101 Patch available CNA
Firefox ESR VendorMozilla Affected before 91.10 Fixed in 91.10 Patch available CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:firefox::::::::	before 101	Vulnerable	Mozilla
cpe:2.3:a:mozilla:firefox_esr::::::::	before 91.10	Vulnerable	Mozilla
cpe:2.3:a:mozilla:thunderbird::::::::	before 91.10	Vulnerable	Mozilla

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 101 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 91.10 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 91.10 Vulnerable ·Mozilla

Remediation

Fix · CNA Thunderbird (Mozilla) Fixed in 91.10
Fix · CNA Firefox (Mozilla) Fixed in 101
Fix · CNA Firefox ESR (Mozilla) Fixed in 91.10

Red Hat 12 advisories

RHSA-2022:4890 Released 2022-06-03 · Red Hat rating Important
thunderbird security update
- Red Hat Enterprise Linux AppStream EUS (v. 8.2) thunderbird-91.10.0-1.el8_2
RHSA-2022:4892 Released 2022-06-03 · Red Hat rating Important
thunderbird security update
- Red Hat Enterprise Linux AppStream (v. 9) thunderbird-91.10.0-1.el9_0
RHSA-2022:4887 Released 2022-06-03 · Red Hat rating Important
thunderbird security update
- Red Hat Enterprise Linux AppStream (v. 8) thunderbird-91.10.0-1.el8_6

Show 9 more Red Hat advisories

RHSA-2022:4888 Released 2022-06-03 · Red Hat rating Important
thunderbird security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-91.10.0-1.el8_1
RHSA-2022:4891 Released 2022-06-03 · Red Hat rating Important
thunderbird security update
- Red Hat Enterprise Linux Client (v. 7) thunderbird-91.10.0-1.el7_9
- Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-91.10.0-1.el7_9
- Red Hat Enterprise Linux Workstation (v. 7) thunderbird-91.10.0-1.el7_9
RHSA-2022:4889 Released 2022-06-02 · Red Hat rating Important
thunderbird security update
- Red Hat Enterprise Linux AppStream EUS (v.8.4) thunderbird-91.10.0-1.el8_4
RHSA-2022:4871 Released 2022-06-01 · Red Hat rating Important
firefox security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox-91.10.0-1.el8_1
RHSA-2022:4872 Released 2022-06-01 · Red Hat rating Important
firefox security update
- Red Hat Enterprise Linux AppStream (v. 8) firefox-91.10.0-1.el8_6
RHSA-2022:4873 Released 2022-06-01 · Red Hat rating Important
firefox security update
- Red Hat Enterprise Linux AppStream (v. 9) firefox-91.10.0-1.el9_0
RHSA-2022:4875 Released 2022-06-01 · Red Hat rating Important
firefox security update
- Red Hat Enterprise Linux AppStream EUS (v.8.4) firefox-91.10.0-1.el8_4
RHSA-2022:4876 Released 2022-06-01 · Red Hat rating Important
firefox security update
- Red Hat Enterprise Linux AppStream EUS (v. 8.2) firefox-91.10.0-1.el8_2
RHSA-2022:4870 Released 2022-06-01 · Red Hat rating Important
firefox security update
- Red Hat Enterprise Linux Client (v. 7) firefox-91.10.0-1.el7_9
- Red Hat Enterprise Linux Client Optional (v. 7) firefox-91.10.0-1.el7_9
- Red Hat Enterprise Linux Server (v. 7) firefox-91.10.0-1.el7_9
- Red Hat Enterprise Linux Server Optional (v. 7) firefox-91.10.0-1.el7_9
- Red Hat Enterprise Linux Workstation (v. 7) firefox-91.10.0-1.el7_9
- Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-91.10.0-1.el7_9

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 101
12 records Highest priority Priority HIGH 2 HIGH, 10 MEDIUM
Other records, highest priority first
- TI-2022-13633 Out-of-bounds write in Mozilla ThunderbirdPriority HIGH 82
- TI-2022-13637 Use of uninitialized resource in Mozilla ThunderbirdPriority HIGH 73
- TI-2022-13640 Cross-site scripting in Mozilla Firefox ESRPriority MEDIUM 62
Show all 12 records →
Release · 2022-12-22
Mozilla Thunderbird 91.10
9 records Highest priority Priority HIGH 2 HIGH, 6 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2022-13633 Out-of-bounds write in Mozilla ThunderbirdPriority HIGH 82
- TI-2022-13637 Use of uninitialized resource in Mozilla ThunderbirdPriority HIGH 73
- TI-2022-13638 Observable discrepancy in Mozilla ThunderbirdPriority MEDIUM 62
Show all 9 records →

Show 1 more group

Release · 2022-12-22
Mozilla Firefox ESR 91.10
8 records Highest priority Priority HIGH 2 HIGH, 6 MEDIUM
Other records, highest priority first
- TI-2022-13633 Out-of-bounds write in Mozilla ThunderbirdPriority HIGH 82
- TI-2022-13637 Use of uninitialized resource in Mozilla ThunderbirdPriority HIGH 73
- TI-2022-13638 Observable discrepancy in Mozilla ThunderbirdPriority MEDIUM 62
Show all 8 records →

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)	Fixed	RHSA-2022:4872, RHSA-2022:4887
Red Hat Enterprise Linux AppStream (v. 9)	Fixed	RHSA-2022:4873, RHSA-2022:4892
Red Hat Enterprise Linux AppStream E4S (v. 8.1)	Fixed	RHSA-2022:4871, RHSA-2022:4888
Red Hat Enterprise Linux AppStream EUS (v. 8.2)	Fixed	RHSA-2022:4876, RHSA-2022:4890
Red Hat Enterprise Linux AppStream EUS (v.8.4)	Fixed	RHSA-2022:4875, RHSA-2022:4889
Red Hat Enterprise Linux Client (v. 7)	Fixed	RHSA-2022:4870, RHSA-2022:4891
Red Hat Enterprise Linux Client Optional (v. 7)	Fixed	RHSA-2022:4870
Red Hat Enterprise Linux Server (v. 7)	Fixed	RHSA-2022:4870
Red Hat Enterprise Linux Server Optional (v. 7)	Fixed	RHSA-2022:4870, RHSA-2022:4891
Red Hat Enterprise Linux Workstation (v. 7)	Fixed	RHSA-2022:4870, RHSA-2022:4891
Red Hat Enterprise Linux Workstation Optional (v. 7)	Fixed	RHSA-2022:4870

Timeline

2026-10-02 Threatist record created from CVE-2022-31747
2026-10-03 Alias added: GHSA-82mc-w667-c9g9

References

Advisory 4

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