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TI-2025-11918 Aliases CVE-2025-13020GHSA-2q3p-f6j6-9qhj

Use after free in Mozilla Firefox

Priority MEDIUM 40CWE-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: 17 fixed, 3 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

Use-after-free in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Thunderbird 145, and Thunderbird 140.5.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00306 23rd percentileScored 2026-11-07
Fix Partial Firefox (Mozilla): 140.5, 145Thunderbird (Mozilla): 140.5, 145Red Hat: 25 advisoriesRed Hat: 17 fixed, 3 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
MozillaFirefox—140.5, 145Patch availableCNA
MozillaThunderbird—140.5, 145Patch availableCNA
  • Firefox VendorMozilla Affected — Fixed in 140.5, 145 Patch available CNA
  • Thunderbird VendorMozilla Affected — Fixed in 140.5, 145 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*before 140.5.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*before 145.0VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* Versions before 140.5.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* Versions before 145.0 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 140.5, 145
  • Fix · CNA Thunderbird (Mozilla) Fixed in 140.5, 145

Red Hat 25 advisories

  • RHSA-2025:22883 Released 2025-12-09 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) thunderbird-140.5.0-1.el8_6
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) thunderbird-140.5.0-1.el8_6
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) thunderbird-140.5.0-1.el8_6
  • RHSA-2025:22882 Released 2025-12-09 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) thunderbird-140.5.0-1.el8_8
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) thunderbird-140.5.0-1.el8_8
  • RHSA-2025:22791 Released 2025-12-08 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-140.5.0-1.el8_4
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) thunderbird-140.5.0-1.el8_4
Show 22 more Red Hat advisories
  • RHSA-2025:22792 Released 2025-12-08 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-140.5.0-1.el8_2
  • RHSA-2025:22449 Released 2025-12-01 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) thunderbird-140.5.0-1.el9_4
  • RHSA-2025:22451 Released 2025-12-01 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) thunderbird-140.5.0-1.el9_0
  • RHSA-2025:22450 Released 2025-12-01 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) thunderbird-140.5.0-1.el9_2
  • RHSA-2025:22374 Released 2025-12-01 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) firefox-140.5.0-1.el9_4, firefox-x11-140.5.0-1.el9_4
  • RHSA-2025:22375 Released 2025-12-01 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) firefox-140.5.0-1.el9_2, firefox-x11-140.5.0-1.el9_2
  • RHSA-2025:22371 Released 2025-12-01 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) firefox-140.5.0-1.el7_9
  • RHSA-2025:22372 Released 2025-12-01 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) firefox-140.5.0-1.el8_8
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) firefox-140.5.0-1.el8_8
  • RHSA-2025:22363 Released 2025-12-01 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-140.5.0-1.el8_10
  • RHSA-2025:22373 Released 2025-12-01 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) firefox-140.5.0-1.el9_0
  • RHSA-2025:22368 Released 2025-12-01 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) firefox-140.5.0-1.el8_6
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) firefox-140.5.0-1.el8_6
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) firefox-140.5.0-1.el8_6
  • RHSA-2025:22369 Released 2025-12-01 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox-140.5.0-1.el8_2
  • RHSA-2025:22367 Released 2025-12-01 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox-140.5.0-1.el8_4
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) firefox-140.5.0-1.el8_4
  • RHSA-2025:21881 Released 2025-11-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-140.5.0-2.el8_10
  • RHSA-2025:21842 Released 2025-11-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-140.5.0-1.el9_7
  • RHSA-2025:21844 Released 2025-11-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) thunderbird-140.5.0-1.el10_0
  • RHSA-2025:21841 Released 2025-11-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) thunderbird-140.5.0-1.el9_6
  • RHSA-2025:21843 Released 2025-11-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 10) thunderbird-140.5.0-2.el10_1
  • RHSA-2025:21280 Released 2025-11-13 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 9) firefox-140.5.0-1.el9_7, firefox-x11-140.5.0-1.el9_7
  • RHSA-2025:21281 Released 2025-11-13 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 10) firefox-140.5.0-2.el10_1
  • RHSA-2025:21121 Released 2025-11-12 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) firefox-140.5.0-1.el9_6, firefox-x11-140.5.0-1.el9_6
  • RHSA-2025:21120 Released 2025-11-12 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) firefox-140.5.0-2.el10_0

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:21281, RHSA-2025:21843
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2025:21881, RHSA-2025:22363
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:21280, RHSA-2025:21842
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2025:22369, RHSA-2025:22792
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2025:22367, RHSA-2025:22791
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2025:22368, RHSA-2025:22883
Red Hat Enterprise Linux AppStream E4S (v.8.6)Fixed RHSA-2025:22368, RHSA-2025:22883
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2025:22372, RHSA-2025:22882
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:22373, RHSA-2025:22451
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2025:22375, RHSA-2025:22450
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2025:21120, RHSA-2025:21844
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:22374, RHSA-2025:22449
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2025:21121, RHSA-2025:21841
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)Fixed RHSA-2025:22367, RHSA-2025:22791
Red Hat Enterprise Linux AppStream TUS (v.8.6)Fixed RHSA-2025:22368, RHSA-2025:22883
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2025:22372, RHSA-2025:22882
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2025:22371

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-13020
  2. 2026-10-03 Alias added: GHSA-2q3p-f6j6-9qhj

References

Advisory 2

Other 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