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TI-2025-13082 Aliases CVE-2025-14321GHSA-g2fh-3663-3jf8

Use after free in Mozilla Firefox

Priority MEDIUM 50CWE-416Published · 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: 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: Signaling component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00596 48th percentileScored 2026-11-07
Fix Partial Firefox (Mozilla): 140.6, 146Thunderbird (Mozilla): 140.6, 146Red Hat: 25 advisoriesRed Hat: 17 fixed, 3 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
MozillaFirefox—140.6, 146Patch availableCNA
MozillaThunderbird—140.6, 146Patch availableCNA
  • Firefox VendorMozilla Affected — Fixed in 140.6, 146 Patch available CNA
  • Thunderbird VendorMozilla Affected — Fixed in 140.6, 146 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*before 140.6.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*before 146.0VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*before 140.6.0VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*before 146.0VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* Versions before 140.6.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* Versions before 146.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:* Versions before 140.6.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:* Versions before 146.0 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 140.6, 146
  • Fix · CNA Thunderbird (Mozilla) Fixed in 140.6, 146

Red Hat 25 advisories

  • RHSA-2026:0124 Released 2026-01-06 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) thunderbird-140.6.0-1.el10_0
  • RHSA-2026:0127 Released 2026-01-06 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) firefox-140.6.0-1.el10_0
  • RHSA-2026:0013 Released 2026-01-05 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) firefox-140.6.0-2.el9_6, firefox-x11-140.6.0-2.el9_6
Show 22 more Red Hat advisories
  • RHSA-2026:0016 Released 2026-01-05 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) firefox-140.6.0-1.el9_4, firefox-x11-140.6.0-1.el9_4
  • RHSA-2026:0022 Released 2026-01-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) thunderbird-140.6.0-1.el8_6
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) thunderbird-140.6.0-1.el8_6
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) thunderbird-140.6.0-1.el8_6
  • RHSA-2026:0021 Released 2026-01-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) thunderbird-140.6.0-1.el8_8
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) thunderbird-140.6.0-1.el8_8
  • RHSA-2026:0026 Released 2026-01-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-140.6.0-1.el8_10
  • RHSA-2026:0003 Released 2026-01-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) thunderbird-140.6.0-1.el9_6
  • RHSA-2026:0004 Released 2026-01-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) thunderbird-140.6.0-1.el9_4
  • RHSA-2026:0023 Released 2026-01-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-140.6.0-1.el8_4
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) thunderbird-140.6.0-1.el8_4
  • RHSA-2026:0017 Released 2026-01-05 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) firefox-140.6.0-1.el9_2, firefox-x11-140.6.0-1.el9_2
  • RHSA-2026:0014 Released 2026-01-05 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) firefox-140.6.0-2.el8_6
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) firefox-140.6.0-2.el8_6
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) firefox-140.6.0-2.el8_6
  • RHSA-2026:0019 Released 2026-01-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) thunderbird-140.6.0-1.el9_2
  • RHSA-2026:0018 Released 2026-01-05 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) firefox-140.6.0-1.el9_0
  • RHSA-2026:0020 Released 2026-01-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) thunderbird-140.6.0-1.el9_0
  • RHSA-2026:0007 Released 2026-01-05 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) firefox-140.6.0-1.el7_9
  • RHSA-2026:0015 Released 2026-01-05 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) firefox-140.6.0-2.el8_8
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) firefox-140.6.0-2.el8_8
  • RHSA-2026:0025 Released 2026-01-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 10) thunderbird-140.6.0-1.el10_1
  • RHSA-2026:0024 Released 2026-01-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-140.6.0-1.el8_2
  • RHSA-2026:0006 Released 2026-01-05 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox-140.6.0-2.el8_4
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) firefox-140.6.0-2.el8_4
  • RHSA-2026:0005 Released 2026-01-05 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox-140.6.0-1.el8_2
  • RHSA-2025:23856 Released 2025-12-22 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-140.6.0-1.el9_7
  • RHSA-2025:23128 Released 2025-12-11 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-140.6.0-1.el8_10
  • RHSA-2025:23034 Released 2025-12-10 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 9) firefox-140.6.0-1.el9_7, firefox-x11-140.6.0-1.el9_7
  • RHSA-2025:23035 Released 2025-12-10 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 10) firefox-140.6.0-1.el10_1

Vendor assessments

Red Hat

Red Hat rating: Important. 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-2025:23035, RHSA-2026:0025
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2025:23128, RHSA-2026:0026
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:23034, RHSA-2025:23856
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2026:0005, RHSA-2026:0024
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2026:0006, RHSA-2026:0023
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2026:0014, RHSA-2026:0022
Red Hat Enterprise Linux AppStream E4S (v.8.6)Fixed RHSA-2026:0014, RHSA-2026:0022
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2026:0015, RHSA-2026:0021
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2026:0018, RHSA-2026:0020
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:0017, RHSA-2026:0019
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:0124, RHSA-2026:0127
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2026:0004, RHSA-2026:0016
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:0003, RHSA-2026:0013
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)Fixed RHSA-2026:0006, RHSA-2026:0023
Red Hat Enterprise Linux AppStream TUS (v.8.6)Fixed RHSA-2026:0014, RHSA-2026:0022
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2026:0015, RHSA-2026:0021
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2026:0007

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-14321
  2. 2026-10-03 Alias added: GHSA-g2fh-3663-3jf8

References

Advisory 4

Other 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