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TI-2022-09831 Aliases CVE-2022-26485GHSA-rj77-m66j-h24w

Use after free in Mozilla Firefox

Priority CRITICAL 97Exploited in the wildCWE-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, 2 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

Removing an XSLT parameter during processing could have lead to an exploitable use-after-free. We have had reports of attacks in the wild abusing this flaw. This vulnerability affects Firefox < 97.0.2, Firefox ESR < 91.6.1, Firefox for Android < 97.3.0, Thunderbird < 91.6.2, and Focus < 97.3.0.

Why it matters now

Exploitation Active In CISA KEV since 2022-03-07CISA due date 2022-03-21
EPSS 0.14261 96th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Firefox (Mozilla): 97.0.2Firefox ESR (Mozilla): 91.6.1+3 more productsRed Hat: 10 advisoriesRed Hat: 10 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
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 97.0.297.0.2Patch availableCNA
MozillaFirefox ESRbefore 91.6.191.6.1Patch availableCNA
MozillaFirefox for Androidbefore 97.3.097.3.0Patch availableCNA
MozillaThunderbirdbefore 91.6.291.6.2Patch availableCNA
MozillaFocusbefore 97.3.097.3.0Patch availableCNA
  • Firefox VendorMozilla Affected before 97.0.2 Fixed in 97.0.2 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 91.6.1 Fixed in 91.6.1 Patch available CNA
  • Firefox for Android VendorMozilla Affected before 97.3.0 Fixed in 97.3.0 Patch available CNA
  • Thunderbird VendorMozilla Affected before 91.6.2 Fixed in 91.6.2 Patch available CNA
  • Focus VendorMozilla Affected before 97.3.0 Fixed in 97.3.0 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*before 91.6.1VulnerableMozilla
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*before 97.0.2VulnerableMozilla
cpe:2.3:a:mozilla:firefox_focus:*:*:*:*:*:*:*:*before 97.3.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:android:*:*before 97.3.0VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 91.6.2VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* Versions before 91.6.1 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* Versions before 97.0.2 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_focus:*:*:*:*:*:*:*:* Versions before 97.3.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:android:*:* Versions before 97.3.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 91.6.2 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 97.0.2
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 91.6.1
  • Fix · CNA Firefox for Android (Mozilla) Fixed in 97.3.0
  • Fix · CNA Thunderbird (Mozilla) Fixed in 91.6.2
  • Fix · CNA Focus (Mozilla) Fixed in 97.3.0

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, Firefox ESR and 3 more products 91.6.1, 91.6.2 and 2 more versions

    2 records Highest priority Priority CRITICAL 2 CRITICAL

    Other records, highest priority first

    • TI-2022-09832 Use after free in Mozilla FirefoxPriority CRITICAL 100
    Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Critical. 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 8AffectedNo fix yet
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. 2022-03-07 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2022-26485
  3. 2026-10-03 Alias added: GHSA-rj77-m66j-h24w

References

Exploit 1

Advisory 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