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TI-2019-07182 Aliases CVE-2019-9796GHSA-43x5-8m6r-mx5q

Use after free in Mozilla Thunderbird

Priority MEDIUM 46CWE-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
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

A use-after-free vulnerability can occur when the SMIL animation controller incorrectly registers with the refresh driver twice when only a single registration is expected. When a registration is later freed with the removal of the animation controller element, the refresh driver incorrectly leaves a dangling pointer to the driver's observer array. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

Why it matters now

EPSS 0.0206 81st percentileScored 2026-11-07
Fix Fixed Thunderbird (Mozilla): 60.6Firefox ESR (Mozilla): 60.6+1 more productRed Hat: 6 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaThunderbirdbefore 60.660.6Patch availableCNA
MozillaFirefox ESRbefore 60.660.6Patch availableCNA
MozillaFirefoxbefore 6666Patch availableCNA
  • Thunderbird VendorMozilla Affected before 60.6 Fixed in 60.6 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 60.6 Fixed in 60.6 Patch available CNA
  • Firefox VendorMozilla Affected before 66 Fixed in 66 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 60.6.0; before 66.0VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 60.6.0VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 60.6.0; before 66.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 60.6.0 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 60.6
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 60.6
  • Fix · CNA Firefox (Mozilla) Fixed in 66

Red Hat 6 advisories

  • RHSA-2019:1144 Released 2019-05-13 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-60.6.1-1.el8
  • RHSA-2019:0966 Released 2019-05-07 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-60.6.1-1.el8
  • RHSA-2019:0681 Released 2019-03-28 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-60.6.1-1.el7_6
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-60.6.1-1.el7_6
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-60.6.1-1.el7_6
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) thunderbird-60.6.1-1.el7_6
Show 3 more Red Hat advisories
  • RHSA-2019:0680 Released 2019-03-28 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Desktop (v. 6) thunderbird-60.6.1-1.el6_10
    • Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-60.6.1-1.el6_10
    • Red Hat Enterprise Linux Workstation (v. 6) thunderbird-60.6.1-1.el6_10
  • RHSA-2019:0623 Released 2019-03-20 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux Desktop (v. 6) firefox-60.6.0-3.el6_10
    • Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-60.6.0-3.el6_10
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-60.6.0-3.el6_10
    • Red Hat Enterprise Linux Server (v. 6) firefox-60.6.0-3.el6_10
    • Red Hat Enterprise Linux Server Optional (v. 6) firefox-60.6.0-3.el6_10
    • Red Hat Enterprise Linux Workstation (v. 6) firefox-60.6.0-3.el6_10
    • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-60.6.0-3.el6_10
  • RHSA-2019:0622 Released 2019-03-20 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-60.6.0-3.el7_6
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-60.6.0-3.el7_6
    • Red Hat Enterprise Linux Server (v. 7) firefox-60.6.0-3.el7_6
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-60.6.0-3.el7_6
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-60.6.0-3.el7_6
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-60.6.0-3.el7_6
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) firefox-60.6.0-3.el7_6

Fixed in the same release

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

  • Release ·

    Mozilla Firefox 66

    21 records Highest priority Priority MEDIUM 10 MEDIUM, 11 LOW

    Other records, highest priority first

    • TI-2019-07177 Type confusion in Mozilla ThunderbirdPriority MEDIUM 61
    • TI-2019-07178 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 57
    • TI-2019-07190 OS command injection in Mozilla FirefoxPriority MEDIUM 46
    Show all 21 records →
  • Release ·

    Mozilla Firefox ESR, Thunderbird 60.6

    9 records Highest priority Priority MEDIUM 7 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2019-07177 Type confusion in Mozilla ThunderbirdPriority MEDIUM 61
    • TI-2019-07178 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 57
    • TI-2019-07180 A vulnerability was discovered where specific command line arguments are not properly…Priority MEDIUM 46
    Show all 9 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2019:0966, RHSA-2019:1144
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2019:0622, RHSA-2019:0681
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2019:0622
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2019:0623, RHSA-2019:0680
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2019:0623
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2019:0623
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2019:0623
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2019:0622
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2019:0623, RHSA-2019:0680
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2019:0622, RHSA-2019:0681
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2019:0623, RHSA-2019:0680
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:0622, RHSA-2019:0681
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2019:0623
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2019:0622
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2019:0622
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2019:0681

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-9796
  2. 2026-10-03 Alias added: GHSA-43x5-8m6r-mx5q

References

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