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TI-2025-01682 Aliases CVE-2025-1937GHSA-5427-6cg5-37h6

Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 115.21, Firefox ESR 128.8, and Thunderbird 128.8

Priority LOW 36CWE-1260Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 14 fixed, 4 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, and Thunderbird 128.7. 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 was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00562 46th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Firefox (Mozilla): 115.21, 128.8, 136Thunderbird (Mozilla): 128.8, 136Red Hat: 19 advisoriesRed Hat: 14 fixed, 4 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—115.21, 128.8, 136Patch availableCNA
MozillaThunderbird—128.8, 136Patch availableCNA
  • Firefox VendorMozilla Affected — Fixed in 115.21, 128.8, 136 Patch available CNA
  • Thunderbird VendorMozilla Affected — Fixed in 128.8, 136 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*before 115.21.0; before 128.8.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 135.0VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 128.8.0; 129.0 to before 136.0VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* Versions before 115.21.0; before 128.8.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 135.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 128.8.0; 129.0 to before 136.0 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 115.21, 128.8, 136
  • Fix · CNA Thunderbird (Mozilla) Fixed in 128.8, 136

Red Hat 19 advisories

  • RHSA-2025:3036 Released 2025-03-19 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) thunderbird-128.8.0-2.el8_6
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) thunderbird-128.8.0-2.el8_6
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) thunderbird-128.8.0-2.el8_6
  • RHSA-2025:3013 Released 2025-03-18 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) thunderbird-128.8.0-2.el9_0
  • RHSA-2025:3009 Released 2025-03-18 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-128.8.0-2.el8_4
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) thunderbird-128.8.0-2.el8_4
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) thunderbird-128.8.0-2.el8_4
Show 16 more Red Hat advisories
  • RHSA-2025:2958 Released 2025-03-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.8) thunderbird-128.8.0-2.el8_8
  • RHSA-2025:2959 Released 2025-03-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) thunderbird-128.8.0-2.el9_2
  • RHSA-2025:2960 Released 2025-03-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-128.8.0-2.el8_2
  • RHSA-2025:2957 Released 2025-03-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) thunderbird-128.8.0-2.el9_4
  • RHSA-2025:2900 Released 2025-03-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-128.8.0-2.el8_10
  • RHSA-2025:2899 Released 2025-03-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-128.8.0-2.el9_5
  • RHSA-2025:2708 Released 2025-03-13 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox-128.8.0-1.el8_2
  • RHSA-2025:2699 Released 2025-03-13 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) firefox-128.8.0-1.el7_9
  • RHSA-2025:2486 Released 2025-03-10 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.8) firefox-128.8.0-1.el8_8
  • RHSA-2025:2484 Released 2025-03-10 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox-128.8.0-1.el8_4
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox-128.8.0-1.el8_4
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox-128.8.0-1.el8_4
  • RHSA-2025:2485 Released 2025-03-10 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) firefox-128.8.0-1.el8_6
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) firefox-128.8.0-1.el8_6
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) firefox-128.8.0-1.el8_6
  • RHSA-2025:2479 Released 2025-03-10 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) firefox-128.8.0-1.el9_4, firefox-x11-128.8.0-1.el9_4
  • RHSA-2025:2480 Released 2025-03-10 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) firefox-128.8.0-1.el9_2, firefox-x11-128.8.0-1.el9_2
  • RHSA-2025:2481 Released 2025-03-10 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) firefox-128.8.0-1.el9_0
  • RHSA-2025:2452 Released 2025-03-06 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-128.8.0-1.el8_10
  • RHSA-2025:2359 Released 2025-03-05 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 9) firefox-128.8.0-1.el9_5, firefox-x11-128.8.0-1.el9_5

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 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2025:2452, RHSA-2025:2900
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:2359, RHSA-2025:2899
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2025:2708, RHSA-2025:2960
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2025:2484, RHSA-2025:3009
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2025:2485, RHSA-2025:3036
Red Hat Enterprise Linux AppStream E4S (v.8.4)Fixed RHSA-2025:2484, RHSA-2025:3009
Red Hat Enterprise Linux AppStream E4S (v.8.6)Fixed RHSA-2025:2485, RHSA-2025:3036
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:2481, RHSA-2025:3013
Red Hat Enterprise Linux AppStream EUS (v.8.8)Fixed RHSA-2025:2486, RHSA-2025:2958
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2025:2480, RHSA-2025:2959
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:2479, RHSA-2025:2957
Red Hat Enterprise Linux AppStream TUS (v.8.4)Fixed RHSA-2025:2484, RHSA-2025:3009
Red Hat Enterprise Linux AppStream TUS (v.8.6)Fixed RHSA-2025:2485, RHSA-2025:3036
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2025:2699
Not affected: 1 product
  • Red Hat Enterprise Linux 10

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-1937
  2. 2026-10-03 Alias added: GHSA-5427-6cg5-37h6

References

Exploit 1

Advisory 6

  • 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