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Fencer Intel
high 7.5

CVE-2015-7210 json

Use-after-free vulnerability in Mozilla Firefox before 43.0 and Firefox ESR 38.x before 38.5 allows remote attackers to execute arbitrary c…

published 2015-12-16 10 y ago modified 2026-06-17 4 mo ago also EUVD-2015-7142

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.3%
EPSS 4.3% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

Use-after-free vulnerability in Mozilla Firefox before 43.0 and Firefox ESR 38.x before 38.5 allows remote attackers to execute arbitrary code by triggering attempted use of a data channel that has been closed by a WebRTC function.

Patch / fix

  • firefox Ubuntu 14.04 LTS 43.0+build1-0ubuntu0.14.04.1

ubuntu advisories UBUNTU-CVE-2015-7210

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • firefox RHEL 5 38.5.0-2.el5_11
  • firefox RHEL 6 38.5.0-2.el6_7
  • firefox RHEL 7 38.5.0-3.el7_2

red hat advisories RHSA-2015:2657

  • MozillaFirefox SLES 11 SP4, SLES 11 SP3-TERADATA, SLES 11 SP3 +7 more 38.5.0esr-28.2
  • MozillaFirefox SLES for SAP 12 SP1, SLES for SAP 12, SLES 12 SP1 +5 more 38.5.0esr-54.1

suse advisories SUSE-SU-2015:2334-1SUSE-SU-2015:2336-1SUSE-SU-2015:2335-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1
  • MozillaThunderbird openSUSE Tumbleweed 45.5.1-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10071-1openSUSE-SU-2024:10230-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-7210 updated cvss 6.8

Mozilla: Use-after-free in WebRTC when datachannel is used after being destroyed (MFSA 2015-138)

  • Red Hat Enterprise Linux (v. 5 server) firefox 38.5.0-2.el5_11 Red Hat Enterprise Linux Client (v. 7) firefox 38.5.0-3.el7_2 Red Hat Enterprise Linux Client Optional (v. 7) firefox 38.5.0-3.el7_2 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 38.5.0-2.el5_11 Red Hat Enterprise Linux Desktop (v. 6) firefox 38.5.0-2.el6_7 Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 38.5.0-2.el6_7
    +9 more products
    Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 38.5.0-2.el6_7 Red Hat Enterprise Linux Server (v. 6) firefox 38.5.0-2.el6_7 Red Hat Enterprise Linux Server (v. 7) firefox 38.5.0-3.el7_2 Red Hat Enterprise Linux Server Optional (v. 6) firefox 38.5.0-2.el6_7 Red Hat Enterprise Linux Server Optional (v. 7) firefox 38.5.0-3.el7_2 Red Hat Enterprise Linux Workstation (v. 6) firefox 38.5.0-2.el6_7 Red Hat Enterprise Linux Workstation (v. 7) firefox 38.5.0-3.el7_2 Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 38.5.0-2.el6_7 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 38.5.0-3.el7_2
    fixed: vendor fix RHSA-2015:2657
  • Red Hat Enterprise Linux 5 thunderbird Red Hat Enterprise Linux 6 thunderbird Red Hat Enterprise Linux 7 thunderbird
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.31% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.