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TI-2022-15378 Aliases CVE-2022-34484GHSA-46rh-mcf3-6v59

Use after free in Mozilla Firefox

Priority HIGH 73CWE-416Published · 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-416 and the CVSS impact.

Summary

The Mozilla Fuzzing Team reported potential vulnerabilities present in Thunderbird 91.10. 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 < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01004 63rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Firefox (Mozilla): 102Firefox ESR (Mozilla): 91.11+1 more productRed Hat: 12 advisoriesRed Hat: 11 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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 102102Patch availableCNA
MozillaFirefox ESRbefore 91.1191.11Patch availableCNA
MozillaThunderbirdbefore 102; before 91.11102, 91.11Patch availableCNA
  • Firefox VendorMozilla Affected before 102 Fixed in 102 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 91.11 Fixed in 91.11 Patch available CNA
  • Thunderbird VendorMozilla Affected before 102; before 91.11 Fixed in 102, 91.11 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 102.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 91.11VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 91.11VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 102.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 91.11 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 91.11 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 102
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 91.11
  • Fix · CNA Thunderbird (Mozilla) Fixed in 102, 91.11

Red Hat 12 advisories

  • RHSA-2022:5482 Released 2022-07-01 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-91.11.0-2.el9_0
  • RHSA-2022:5481 Released 2022-07-01 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 9) firefox-91.11.0-2.el9_0
  • RHSA-2022:5479 Released 2022-07-01 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-91.11.0-2.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-91.11.0-2.el7_9
    • Red Hat Enterprise Linux Server (v. 7) firefox-91.11.0-2.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-91.11.0-2.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-91.11.0-2.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-91.11.0-2.el7_9
Show 9 more Red Hat advisories
  • RHSA-2022:5480 Released 2022-07-01 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-91.11.0-2.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-91.11.0-2.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-91.11.0-2.el7_9
  • RHSA-2022:5474 Released 2022-07-01 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) firefox-91.11.0-2.el8_2
  • RHSA-2022:5475 Released 2022-07-01 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) thunderbird-91.11.0-2.el8_2
  • RHSA-2022:5470 Released 2022-06-30 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-91.11.0-2.el8_6
  • RHSA-2022:5469 Released 2022-06-30 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-91.11.0-2.el8_6
  • RHSA-2022:5472 Released 2022-06-30 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) firefox-91.11.0-2.el8_4
  • RHSA-2022:5473 Released 2022-06-30 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) thunderbird-91.11.0-2.el8_4
  • RHSA-2022:5478 Released 2022-06-30 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-91.11.0-2.el8_1
  • RHSA-2022:5477 Released 2022-06-30 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox-91.11.0-2.el8_1

Fixed in the same release

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

  • Release ·

    Mozilla Firefox 102

    19 records Highest priority Priority HIGH 6 HIGH, 7 MEDIUM, 6 LOW

    Other records, highest priority first

    • TI-2022-15364 Use after free in Mozilla FirefoxPriority HIGH 82
    • TI-2022-15376 Unrestricted file upload in Mozilla FirefoxPriority HIGH 73
    • TI-2022-15363 Improper certificate validation in Mozilla FirefoxPriority HIGH 73
    Show all 19 records →
  • Release ·

    Mozilla Thunderbird 102, 91.11

    10 records Highest priority Priority HIGH 3 HIGH, 4 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2022-15364 Use after free in Mozilla FirefoxPriority HIGH 82
    • TI-2022-15362 An iframe that was not permitted to run scripts could do so if the user clicked on a…Priority HIGH 73
    • TI-2022-15373 A malicious website that could create a popup could have resized the popup to overlay the…Priority MEDIUM 62
    Show all 10 records →
Show 1 more group
  • Release ·

    Mozilla Firefox ESR 91.11

    9 records Highest priority Priority HIGH 3 HIGH, 4 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2022-15364 Use after free in Mozilla FirefoxPriority HIGH 82
    • TI-2022-15362 An iframe that was not permitted to run scripts could do so if the user clicked on a…Priority HIGH 73
    • TI-2022-15373 A malicious website that could create a popup could have resized the popup to overlay the…Priority MEDIUM 62
    Show all 9 records →

Vendor assessments

Red Hat

Red Hat rating: Important. 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-2022:5469, RHSA-2022:5470
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2022:5481, RHSA-2022:5482
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2022:5477, RHSA-2022:5478
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2022:5474, RHSA-2022:5475
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2022:5472, RHSA-2022:5473
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2022:5479, RHSA-2022:5480
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2022:5479
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2022:5479
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2022:5479, RHSA-2022:5480
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2022:5479, RHSA-2022:5480
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2022:5479

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-34484
  2. 2026-10-03 Alias added: GHSA-46rh-mcf3-6v59

References

Exploit 1

Advisory 3

  • 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