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TI-2019-08813 Aliases CVE-2019-11756GHSA-v78f-65qq-96m8

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: 21 fixed, 2 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

Improper refcounting of soft token session objects could cause a use-after-free and crash (likely limited to a denial of service). This vulnerability affects Firefox < 71.

Why it matters now

EPSS 0.01494 74th percentileScored 2026-11-07
Fix Partial Firefox (Mozilla): 71Red Hat: 6 advisoriesRed Hat: 21 fixed, 2 without a fix

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefoxbefore 7171Patch availableCNA
  • Firefox VendorMozilla Affected before 71 Fixed in 71 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 71.0VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 71.0 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 71

Red Hat 6 advisories

  • RHSA-2021:1026 Released 2021-03-30 · Red Hat rating Moderate
    nss-softokn security update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) nss-softokn-3.44.0-9.el7_7, nss-softokn-freebl-3.44.0-9.el7_7
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) nss-softokn-devel-3.44.0-9.el7_7, nss-softokn-freebl-devel-3.44.0-9.el7_7
    • Red Hat Enterprise Linux Server EUS (v. 7.7) nss-softokn-3.44.0-9.el7_7, nss-softokn-3.44.0-9.el7_7.ppc, nss-softokn-devel-3.44.0-9.el7_7 +5
  • RHSA-2021:0949 Released 2021-03-22 · Red Hat rating Low
    Red Hat OpenShift Do openshift/odo-init-image 1.1.3 security update
    • OpenShift Do 1 openshiftdo/odo-init-image-rhel7
  • RHSA-2021:0876 Released 2021-03-16 · Red Hat rating Moderate
    nss and nss-softokn security update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) nss-3.36.0-9.el7_6, nss-softokn-3.36.0-7.el7_6, nss-softokn-freebl-3.36.0-7.el7_6 +2
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) nss-devel-3.36.0-9.el7_6, nss-pkcs11-devel-3.36.0-9.el7_6, nss-softokn-devel-3.36.0-7.el7_6 +1
    • Red Hat Enterprise Linux Server EUS (v. 7.6) nss-3.36.0-9.el7_6, nss-3.36.0-9.el7_6.ppc, nss-devel-3.36.0-9.el7_6 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) nss-pkcs11-devel-3.36.0-9.el7_6, nss-pkcs11-devel-3.36.0-9.el7_6.ppc
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) nss-3.36.0-9.el7_6, nss-devel-3.36.0-9.el7_6, nss-softokn-3.36.0-7.el7_6 +5
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) nss-pkcs11-devel-3.36.0-9.el7_6
Show 3 more Red Hat advisories
  • RHSA-2021:0758 Released 2021-03-09 · Red Hat rating Moderate
    nss-softokn security update
    • Red Hat Enterprise Linux Server AUS (v. 7.4) nss-softokn-3.28.3-10.el7_4, nss-softokn-devel-3.28.3-10.el7_4, nss-softokn-freebl-3.28.3-10.el7_4 +1
    • Red Hat Enterprise Linux Server E4S (v. 7.4) nss-softokn-3.28.3-10.el7_4, nss-softokn-devel-3.28.3-10.el7_4, nss-softokn-freebl-3.28.3-10.el7_4 +1
    • Red Hat Enterprise Linux Server TUS (v. 7.4) nss-softokn-3.28.3-10.el7_4, nss-softokn-devel-3.28.3-10.el7_4, nss-softokn-freebl-3.28.3-10.el7_4 +1
  • RHSA-2020:4076 Released 2020-09-29 · Red Hat rating Moderate
    nss and nspr security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) nspr-4.25.0-2.el7_9, nss-3.53.1-3.el7_9, nss-softokn-3.53.1-6.el7_9 +4
    • Red Hat Enterprise Linux Client Optional (v. 7) nspr-devel-4.25.0-2.el7_9, nss-devel-3.53.1-3.el7_9, nss-pkcs11-devel-3.53.1-3.el7_9 +3
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) nspr-devel-4.25.0-2.el7_9, nss-devel-3.53.1-3.el7_9, nss-pkcs11-devel-3.53.1-3.el7_9 +3
    • Red Hat Enterprise Linux Server (v. 7) nspr-4.25.0-2.el7_9, nspr-4.25.0-2.el7_9.ppc, nspr-devel-4.25.0-2.el7_9 +19
    • Red Hat Enterprise Linux Server Optional (v. 7) nss-pkcs11-devel-3.53.1-3.el7_9, nss-pkcs11-devel-3.53.1-3.el7_9.ppc
    • Red Hat Enterprise Linux Workstation (v. 7) nspr-4.25.0-2.el7_9, nspr-devel-4.25.0-2.el7_9, nss-3.53.1-3.el7_9 +9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) nss-pkcs11-devel-3.53.1-3.el7_9
  • RHSA-2020:3280 Released 2020-08-03 · Red Hat rating Moderate
    nss and nspr security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) nspr-4.25.0-2.el8_2, nspr-devel-4.25.0-2.el8_2, nss-3.53.1-11.el8_2 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
OpenShift Do 1Fixed RHSA-2021:0949
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2020:3280
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2020:4076
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2020:4076
Red Hat Enterprise Linux ComputeNode EUS (v. 7.6)Fixed RHSA-2021:0876
Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)Fixed RHSA-2021:1026
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2020:4076
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6)Fixed RHSA-2021:0876
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7)Fixed RHSA-2021:1026
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:4076
Red Hat Enterprise Linux Server AUS (v. 7.4)Fixed RHSA-2021:0758
Red Hat Enterprise Linux Server E4S (v. 7.4)Fixed RHSA-2021:0758
Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2021:0876
Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2021:1026
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:4076
Red Hat Enterprise Linux Server Optional EUS (v. 7.6)Fixed RHSA-2021:0876
Red Hat Enterprise Linux Server TUS (v. 7.4)Fixed RHSA-2021:0758
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:4076
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:4076
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2021:0876
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2021:0876

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-11756
  2. 2026-10-03 Alias added: GHSA-v78f-65qq-96m8

References

Advisory 1

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