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TI-2016-04556 Aliases CVE-2016-5258GHSA-5v6h-wvqr-3crq

Use-after-free vulnerability in the WebRTC socket thread in Mozilla Firefox before 48.0…

Priority MEDIUM 44CWE-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
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

Use-after-free vulnerability in the WebRTC socket thread in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows remote attackers to execute arbitrary code by leveraging incorrect free operations on DTLS objects during the shutdown of a WebRTC session.

Why it matters now

EPSS 0.03259 88th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 1 advisory

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 8

CPEVersionsRoleVendor
cpe:2.3:o:oracle:linux:5.0:*:*:*:*:*:*:*5.0VulnerableOracle
cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:*6VulnerableOracle
cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:*7VulnerableOracle
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*up to 47.0.1VulnerableMozilla
cpe:2.3:a:mozilla:firefox:45.1.0:*:*:*:*:*:*:*45.1.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox:45.1.1:*:*:*:*:*:*:*45.1.1VulnerableMozilla
cpe:2.3:a:mozilla:firefox:45.2.0:*:*:*:*:*:*:*45.2.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox:45.3.0:*:*:*:*:*:*:*45.3.0VulnerableMozilla
  • cpe:2.3:o:oracle:linux:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Oracle
  • cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:* Versions 6 Vulnerable ·Oracle
  • cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:* Versions 7 Vulnerable ·Oracle
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions up to 47.0.1 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:45.1.0:*:*:*:*:*:*:* Versions 45.1.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:45.1.1:*:*:*:*:*:*:* Versions 45.1.1 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:45.2.0:*:*:*:*:*:*:* Versions 45.2.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:45.3.0:*:*:*:*:*:*:* Versions 45.3.0 Vulnerable ·Mozilla

Remediation

Red Hat 1 advisory

  • RHSA-2016:1551 Released 2016-08-03 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux (v. 5 server) firefox-45.3.0-1.el5_11, firefox-45.3.0-1.el5_11.i386
    • Red Hat Enterprise Linux Client (v. 7) firefox-45.3.0-1.el7_2
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-45.3.0-1.el7_2
    • Red Hat Enterprise Linux Desktop (v. 5 client) firefox-45.3.0-1.el5_11, firefox-45.3.0-1.el5_11.i386
    • Red Hat Enterprise Linux Desktop (v. 6) firefox-45.3.0-1.el6_8
    • Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-45.3.0-1.el6_8
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-45.3.0-1.el6_8
    • Red Hat Enterprise Linux Server (v. 6) firefox-45.3.0-1.el6_8
    • Red Hat Enterprise Linux Server (v. 7) firefox-45.3.0-1.el7_2
    • Red Hat Enterprise Linux Server Optional (v. 6) firefox-45.3.0-1.el6_8, firefox-45.3.0-1.el6_8.ppc
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-45.3.0-1.el7_2, firefox-45.3.0-1.el7_2.ppc
    • Red Hat Enterprise Linux Workstation (v. 6) firefox-45.3.0-1.el6_8
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-45.3.0-1.el7_2
    • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-45.3.0-1.el6_8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-45.3.0-1.el7_2

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2016:1551
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2016:1551
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2016:1551
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2016:1551
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2016:1551
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2016:1551
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2016:1551
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2016:1551
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2016:1551
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2016:1551
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2016:1551
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2016:1551
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2016:1551
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2016:1551
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2016:1551
Not affected: 3 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-5258
  2. 2026-10-03 Alias added: GHSA-5v6h-wvqr-3crq

References

Exploit 1

Advisory 8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences