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TI-2024-04450 Aliases CVE-2024-4777GHSA-qchj-32cr-96w5

Use after free in Mozilla Firefox

Priority MEDIUM 41CWE-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: 16 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

Memory safety bugs present in Firefox 125, Firefox ESR 115.10, and Thunderbird 115.10. 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 affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00536 45th percentileScored 2026-11-07
Fix Partial Firefox (Mozilla): 126Firefox ESR (Mozilla): 115.11+1 more productRed Hat: 18 advisoriesRed Hat: 16 fixed, 1 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
MozillaFirefoxbefore 126126Patch availableCNA
MozillaFirefox ESRbefore 115.11115.11Patch availableCNA
MozillaThunderbirdbefore 115.11115.11Patch availableCNA
  • Firefox VendorMozilla Affected before 126 Fixed in 126 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 115.11 Fixed in 115.11 Patch available CNA
  • Thunderbird VendorMozilla Affected before 115.11 Fixed in 115.11 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*before 115.11.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*before 126.0VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 115.11.0VulnerableMozilla
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* Versions before 115.11.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* Versions before 126.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 115.11.0 Vulnerable ·Mozilla
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 126
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 115.11
  • Fix · CNA Thunderbird (Mozilla) Fixed in 115.11

Red Hat 18 advisories

  • RHSA-2024:3784 Released 2024-06-10 · Red Hat rating Moderate
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-115.11.0-1.el8_10
  • RHSA-2024:3783 Released 2024-06-10 · Red Hat rating Moderate
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-115.11.0-1.el8_10
  • RHSA-2024:3338 Released 2024-05-23 · Red Hat rating Moderate
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-115.11.0-1.el8_2
Show 15 more Red Hat advisories
  • RHSA-2024:2913 Released 2024-05-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-115.11.0-1.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-115.11.0-1.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-115.11.0-1.el7_9
  • RHSA-2024:2912 Released 2024-05-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) thunderbird-115.11.0-1.el8_6
  • RHSA-2024:2911 Released 2024-05-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-115.11.0-1.el8_4
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) thunderbird-115.11.0-1.el8_4
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) thunderbird-115.11.0-1.el8_4
  • RHSA-2024:2903 Released 2024-05-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) thunderbird-115.11.0-1.el9_2
  • RHSA-2024:2906 Released 2024-05-20 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) firefox-115.11.0-1.el9_2, firefox-x11-115.11.0-1.el9_2
  • RHSA-2024:2905 Released 2024-05-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.8) thunderbird-115.11.0-1.el8_8
  • RHSA-2024:2904 Released 2024-05-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) thunderbird-115.11.0-1.el9_0
  • RHSA-2024:2881 Released 2024-05-16 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-115.11.0-1.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-115.11.0-1.el7_9
    • Red Hat Enterprise Linux Server (v. 7) firefox-115.11.0-1.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-115.11.0-1.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-115.11.0-1.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-115.11.0-1.el7_9
  • RHSA-2024:2887 Released 2024-05-16 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) firefox-115.11.0-1.el8_6
  • RHSA-2024:2883 Released 2024-05-16 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 9) firefox-115.11.0-1.el9_4, firefox-x11-115.11.0-1.el9_4
  • RHSA-2024:2885 Released 2024-05-16 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.8) firefox-115.11.0-1.el8_8
  • RHSA-2024:2886 Released 2024-05-16 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox-115.11.0-1.el8_4
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox-115.11.0-1.el8_4
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox-115.11.0-1.el8_4
  • RHSA-2024:2882 Released 2024-05-16 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox-115.11.0-1.el8_2
  • RHSA-2024:2884 Released 2024-05-16 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) firefox-115.11.0-1.el9_0
  • RHSA-2024:2888 Released 2024-05-16 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-115.11.0-1.el9_4

Fixed in the same release

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

  • Release ·

    Mozilla Firefox 126

    16 records Highest priority Priority HIGH 1 HIGH, 7 MEDIUM, 8 LOW

    Other records, highest priority first

    • TI-2024-04069 Improper check for unusual conditions in Mozilla FirefoxPriority HIGH 78
    • TI-2024-04437 Use after free in Mozilla FirefoxPriority MEDIUM 50
    • TI-2024-04444 Use after free in Mozilla FirefoxPriority MEDIUM 44
    Show all 16 records →
  • Release ·

    Mozilla Firefox ESR, Thunderbird 115.11

    6 records Highest priority Priority HIGH 1 HIGH, 2 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2024-04069 Improper check for unusual conditions in Mozilla FirefoxPriority HIGH 78
    • TI-2024-04443 Use after free in Mozilla FirefoxPriority MEDIUM 41
    • TI-2024-04441 A bug in popup notifications' interaction with WebAuthn made it easier for an attacker to…Priority LOW 28
    Show all 6 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. 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-2024:3783, RHSA-2024:3784
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:2883, RHSA-2024:2888
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2024:2882, RHSA-2024:3338
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2024:2886, RHSA-2024:2911
Red Hat Enterprise Linux AppStream E4S (v.8.4)Fixed RHSA-2024:2886, RHSA-2024:2911
Red Hat Enterprise Linux AppStream EUS (v.8.6)Fixed RHSA-2024:2887, RHSA-2024:2912
Red Hat Enterprise Linux AppStream EUS (v.8.8)Fixed RHSA-2024:2885, RHSA-2024:2905
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2024:2884, RHSA-2024:2904
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2024:2903, RHSA-2024:2906
Red Hat Enterprise Linux AppStream TUS (v.8.4)Fixed RHSA-2024:2886, RHSA-2024:2911
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2024:2881, RHSA-2024:2913
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2024:2881
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2024:2881
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2024:2881, RHSA-2024:2913
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2024:2881, RHSA-2024:2913
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2024:2881

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-4777
  2. 2026-10-03 Alias added: GHSA-qchj-32cr-96w5

References

Advisory 3

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