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TI-2022-12268 Aliases CVE-2022-29917GHSA-gfq4-pq7x-mq8c

Out-of-bounds write in Mozilla Thunderbird

Priority MEDIUM 51CWE-787Published · Updated

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-787 and the CVSS impact.

Summary

Mozilla developers Andrew McCreight, Gabriele Svelto, Tom Ritter and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 99 and Firefox ESR 91.8. 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 < 91.9, Firefox ESR < 91.9, and Firefox < 100.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01054 64th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Thunderbird (Mozilla): 91.9Firefox ESR (Mozilla): 91.9+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

VendorProductAffected versionsFixed inStatusSource
MozillaThunderbirdbefore 91.991.9Patch availableCNA
MozillaFirefox ESRbefore 91.991.9Patch availableCNA
MozillaFirefoxbefore 100100Patch availableCNA
  • Thunderbird VendorMozilla Affected before 91.9 Fixed in 91.9 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 91.9 Fixed in 91.9 Patch available CNA
  • Firefox VendorMozilla Affected before 100 Fixed in 100 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 100.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 91.9VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 91.9VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 100.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 91.9 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 91.9 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 91.9
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 91.9
  • Fix · CNA Firefox (Mozilla) Fixed in 100

Red Hat 12 advisories

  • RHSA-2022:4589 Released 2022-05-18 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-91.9.0-3.el9_0
  • RHSA-2022:4590 Released 2022-05-18 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 9) firefox-91.9.0-1.el9_0
  • RHSA-2022:1725 Released 2022-05-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-91.9.0-3.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-91.9.0-3.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-91.9.0-3.el7_9
Show 9 more Red Hat advisories
  • RHSA-2022:1730 Released 2022-05-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-91.9.0-3.el8_5
  • RHSA-2022:1726 Released 2022-05-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) thunderbird-91.9.0-3.el8_4
  • RHSA-2022:1727 Released 2022-05-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-91.9.0-3.el8_1
  • RHSA-2022:1724 Released 2022-05-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) thunderbird-91.9.0-3.el8_2
  • RHSA-2022:1703 Released 2022-05-04 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-91.9.0-1.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-91.9.0-1.el7_9
    • Red Hat Enterprise Linux Server (v. 7) firefox-91.9.0-1.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-91.9.0-1.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-91.9.0-1.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-91.9.0-1.el7_9
  • RHSA-2022:1702 Released 2022-05-04 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) firefox-91.9.0-1.el8_4
  • RHSA-2022:1705 Released 2022-05-04 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-91.9.0-1.el8_5
  • RHSA-2022:1704 Released 2022-05-04 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) firefox-91.9.0-1.el8_2
  • RHSA-2022:1701 Released 2022-05-04 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox-91.9.0-1.el8_1

Fixed in the same release

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

  • Release ·

    Mozilla Firefox 100

    9 records Highest priority Priority HIGH 1 HIGH, 3 MEDIUM, 5 LOW

    Other records, highest priority first

    • TI-2022-12260 Incorrect default permissions in Mozilla ThunderbirdPriority HIGH 73
    • TI-2022-12261 Open redirect in Mozilla FirefoxPriority MEDIUM 60
    • TI-2022-12269 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 41
    Show all 9 records →
  • Release ·

    Mozilla Thunderbird 91.9

    8 records Highest priority Priority HIGH 1 HIGH, 1 MEDIUM, 6 LOW

    Other records, highest priority first

    • TI-2022-12260 Incorrect default permissions in Mozilla ThunderbirdPriority HIGH 73
    • TI-2022-12267 Information disclosure in Mozilla ThunderbirdPriority LOW 30
    • TI-2022-12265 Clickjacking in Mozilla ThunderbirdPriority LOW 30
    Show all 8 records →
Show 1 more group
  • Release ·

    Mozilla Firefox ESR 91.9

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

    Other records, highest priority first

    • TI-2022-12260 Incorrect default permissions in Mozilla ThunderbirdPriority HIGH 73
    • TI-2022-12267 Information disclosure in Mozilla ThunderbirdPriority LOW 30
    • TI-2022-12265 Clickjacking in Mozilla ThunderbirdPriority LOW 30
    Show all 6 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-2022:1705, RHSA-2022:1730
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2022:4589, RHSA-2022:4590
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2022:1701, RHSA-2022:1727
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2022:1704, RHSA-2022:1724
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2022:1702, RHSA-2022:1726
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2022:1703, RHSA-2022:1725
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2022:1703
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2022:1703
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2022:1703, RHSA-2022:1725
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2022:1703, RHSA-2022:1725
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2022:1703

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-29917
  2. 2026-10-03 Alias added: GHSA-gfq4-pq7x-mq8c

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