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TI-2022-20918 Aliases CVE-2022-42932GHSA-mw2h-r48f-g8c9

Out-of-bounds write in Mozilla Firefox

Priority MEDIUM 41CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
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-787 and the CVSS impact.

Summary

Mozilla developers Ashley Hale and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 105 and Firefox ESR 102.3. 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 < 106, Firefox ESR < 102.4, and Thunderbird < 102.4.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00766 55th percentileScored 2026-11-07
Fix Partial Firefox (Mozilla): 106Firefox ESR (Mozilla): 102.4+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
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefoxbefore 106106Patch availableCNA
MozillaFirefox ESRbefore 102.4102.4Patch availableCNA
MozillaThunderbirdbefore 102.4102.4Patch availableCNA
  • Firefox VendorMozilla Affected before 106 Fixed in 106 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 102.4 Fixed in 102.4 Patch available CNA
  • Thunderbird VendorMozilla Affected before 102.4 Fixed in 102.4 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 106.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 102.4VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 102.4VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 106.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 102.4 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 102.4 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 106
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 102.4
  • Fix · CNA Thunderbird (Mozilla) Fixed in 102.4

Red Hat 12 advisories

  • RHSA-2022:7190 Released 2022-10-25 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-102.4.0-1.el8_6
  • RHSA-2022:7184 Released 2022-10-25 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-102.4.0-1.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-102.4.0-1.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-102.4.0-1.el7_9
  • RHSA-2022:7181 Released 2022-10-25 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) thunderbird-102.4.0-1.el8_4
Show 9 more Red Hat advisories
  • RHSA-2022:7183 Released 2022-10-25 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-102.4.0-1.el8_1
  • RHSA-2022:7182 Released 2022-10-25 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) thunderbird-102.4.0-1.el8_2
  • RHSA-2022:7178 Released 2022-10-25 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-102.4.0-1.el9_0
  • RHSA-2022:7071 Released 2022-10-20 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 9) firefox-102.4.0-1.el9_0
  • RHSA-2022:7072 Released 2022-10-20 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) firefox-102.4.0-1.el8_4
  • RHSA-2022:7069 Released 2022-10-20 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-102.4.0-1.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-102.4.0-1.el7_9
    • Red Hat Enterprise Linux Server (v. 7) firefox-102.4.0-1.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-102.4.0-1.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-102.4.0-1.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-102.4.0-1.el7_9
  • RHSA-2022:7070 Released 2022-10-20 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-102.4.0-1.el8_6
  • RHSA-2022:7068 Released 2022-10-20 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) firefox-102.4.0-1.el8_2
  • RHSA-2022:7066 Released 2022-10-20 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox-102.4.0-1.el8_1

Fixed in the same release

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

  • Release ·

    Mozilla Firefox 106

    7 records Highest priority Priority HIGH 1 HIGH, 4 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2022-20913 Origin validation error in Mozilla FirefoxPriority HIGH 70
    • TI-2022-20917 Cleartext storage of sensitive information in Mozilla FirefoxPriority MEDIUM 49
    • TI-2022-23228 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 47
    Show all 7 records →
  • Release ·

    Mozilla Firefox ESR, Thunderbird 102.4

    4 records Highest priority Priority HIGH 1 HIGH, 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2022-20913 Origin validation error in Mozilla FirefoxPriority HIGH 70
    • TI-2022-20914 NULL pointer dereference in Mozilla FirefoxPriority MEDIUM 42
    • TI-2022-20915 Uncontrolled resource consumption in Mozilla FirefoxPriority LOW 30
    Show all 4 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2022:7070, RHSA-2022:7190
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2022:7071, RHSA-2022:7178
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2022:7066, RHSA-2022:7183
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2022:7068, RHSA-2022:7182
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2022:7072, RHSA-2022:7181
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2022:7069, RHSA-2022:7184
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2022:7069
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2022:7069
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2022:7069, RHSA-2022:7184
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2022:7069, RHSA-2022:7184
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2022:7069

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-42932
  2. 2026-10-03 Alias added: GHSA-mw2h-r48f-g8c9

References

Advisory 3

Other 1

  • 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