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TI-2022-09752 Aliases CVE-2022-26381GHSA-h4wj-cg8v-jxq5

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: 10 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

An attacker could have caused a use-after-free by forcing a text reflow in an SVG object leading to a potentially exploitable crash. This vulnerability affects Firefox < 98, Firefox ESR < 91.7, and Thunderbird < 91.7.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00874 59th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Firefox (Mozilla): 98Firefox ESR (Mozilla): 91.7+1 more productRed Hat: 10 advisoriesRed Hat: 10 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 9898Patch availableCNA
MozillaFirefox ESRbefore 91.791.7Patch availableCNA
MozillaThunderbirdbefore 91.791.7Patch availableCNA
  • Firefox VendorMozilla Affected before 98 Fixed in 98 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 91.7 Fixed in 91.7 Patch available CNA
  • Thunderbird VendorMozilla Affected before 91.7 Fixed in 91.7 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 98.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 91.7VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 91.7VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 98.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 91.7 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 91.7 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 98
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 91.7
  • Fix · CNA Thunderbird (Mozilla) Fixed in 91.7

Red Hat 10 advisories

  • RHSA-2022:0850 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-91.7.0-2.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-91.7.0-2.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-91.7.0-2.el7_9
  • RHSA-2022:0853 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) thunderbird-91.7.0-2.el8_4
  • RHSA-2022:0845 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-91.7.0-2.el8_5
Show 7 more Red Hat advisories
  • RHSA-2022:0847 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-91.7.0-2.el8_1
  • RHSA-2022:0843 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) thunderbird-91.7.0-2.el8_2
  • RHSA-2022:0824 Released 2022-03-10 · Red Hat rating Critical
    firefox security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Server (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-91.7.0-3.el7_9
  • RHSA-2022:0817 Released 2022-03-10 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) firefox-91.7.0-3.el8_4
  • RHSA-2022:0818 Released 2022-03-10 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-91.7.0-3.el8_5
  • RHSA-2022:0816 Released 2022-03-10 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) firefox-91.7.0-3.el8_2
  • RHSA-2022:0815 Released 2022-03-10 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox-91.7.0-3.el8_1

Fixed in the same release

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

  • Release ·

    Mozilla Firefox 98

    7 records Highest priority Priority HIGH 2 HIGH, 3 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2022-09755 Protection mechanism failure in Mozilla FirefoxPriority HIGH 76
    • TI-2022-09754 When resizing a popup after requesting fullscreen access, the popup would not display the…Priority MEDIUM 53
    • TI-2022-09753 Observable discrepancy in Mozilla FirefoxPriority MEDIUM 53
    Show all 7 records →
  • Release ·

    Mozilla Firefox ESR, Thunderbird 91.7

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

    Other records, highest priority first

    • TI-2022-09755 Protection mechanism failure in Mozilla FirefoxPriority HIGH 76
    • TI-2022-09754 When resizing a popup after requesting fullscreen access, the popup would not display the…Priority MEDIUM 53
    • TI-2022-09758 Time-of-check time-of-use race condition in Mozilla FirefoxPriority LOW 36
    Show all 5 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-2022:0818, RHSA-2022:0845
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2022:0815, RHSA-2022:0847
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2022:0816, RHSA-2022:0843
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2022:0817, RHSA-2022:0853
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2022:0824, RHSA-2022:0850
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2022:0824
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2022:0824
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2022:0824, RHSA-2022:0850
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2022:0824, RHSA-2022:0850
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2022:0824
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-26381
  2. 2026-10-03 Alias added: GHSA-h4wj-cg8v-jxq5

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