high 8.8

CVE-2020-15969 json

Use after free in WebRTC in Google Chrome prior to 86.0.4240.75 allowed a remote attacker to potentially exploit heap corruption via a craf…

published 2020-11-03 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-7940

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.7%; EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits: 0; none known

Use after free in WebRTC in Google Chrome prior to 86.0.4240.75 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Patch / fix

fixed in 1 distros 7

Google Chrome 86.0.4240.75

debian ubuntu red hat suse opensuse alpine arch linux

chromium Debian 14, Debian 13, Debian 12 87.0.4280.88-0.1
firefox-esr Debian 14, Debian 13, Debian 12 78.4.0esr-1
thunderbird Debian 14, Debian 13, Debian 12 1:78.4.0-1

debian advisories DEBIAN-CVE-2020-15969

firefox Ubuntu 16.04 LTS 82.0+build2-0ubuntu0.16.04.5
firefox Ubuntu 18.04 LTS 82.0+build2-0ubuntu0.18.04.1
firefox Ubuntu 20.04 LTS 82.0+build2-0ubuntu0.20.04.1
thunderbird Ubuntu 18.04 LTS 1:78.8.1+build1-0ubuntu0.18.04.1
thunderbird Ubuntu 20.04 LTS 1:78.7.1+build1-0ubuntu0.20.04.1
chromium-browser Ubuntu 16.04 LTS 86.0.4240.75-0ubuntu0.16.04.1
chromium-browser Ubuntu 18.04 LTS 86.0.4240.75-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2020-15969

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

thunderbird RHEL 6 78.4.0-1.el6_10
thunderbird RHEL 8 78.4.0-1.el8_3
thunderbird RHEL 7 78.4.0-1.el7_9
firefox RHEL 6 78.4.0-2.el6_10
firefox RHEL 8 78.4.0-1.el8_2
firefox RHEL 7 78.4.0-1.el7_9
chromium-browser RHEL 6 EXTRAS 86.0.4240.75-1.el6_10
thunderbird RHEL 8.0 E4S 78.4.0-1.el8_0

red hat advisories RHSA-2020:4947 RHSA-2020:4944 RHSA-2020:4945 RHSA-2020:4913 RHSA-2020:4909 RHSA-2020:4330

mozilla-nspr SLE Module for Basesystem 15 SP2, SLE Module for Basesystem 15 SP1 4.25.1-3.15.2
MozillaThunderbird SLE Workstation Extension 15 SP2, SLE Workstation Extension 15 SP1 78.4.0-3.99.1
MozillaFirefox SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +15 more 78.4.0-112.28.1
MozillaFirefox SLE Module for Desktop Applications 15 SP1 78.4.0-3.113.3
MozillaFirefox SLE Module for Desktop Applications 15 SP2 78.4.0-8.11.2
MozillaFirefox SLES 11 SP4-LTSS 78.4.0-78.99.1

suse advisories SUSE-SU-2020:3091-1 SUSE-SU-2020:3053-1 SUSE-SU-2020:14522-1 SUSE-SU-2020:3022-1 SUSE-SU-2020:3021-1

firefox-esr openSUSE Tumbleweed 128.5.1-1.1
MozillaFirefox openSUSE Tumbleweed 92.0-1.2
MozillaThunderbird openSUSE Tumbleweed 91.1.1-1.1
chromium openSUSE Tumbleweed 93.0.4577.82-1.1
chromium openSUSE Tumbleweed 113.0.5672.92-1.1
gn Package Hub 15 SP2 0.1807-bp152.2.3.4
chromium Package Hub 15 SP2 86.0.4240.183-bp152.2.26.1
mozilla-nspr openSUSE Leap 15.1 4.25.1-lp151.2.13.1

opensuse advisories openSUSE-SU-2024:14572-1 openSUSE-SU-2024:10600-1 openSUSE-SU-2024:10601-1 openSUSE-SU-2024:10681-1 openSUSE-SU-2024:12948-1 openSUSE-SU-2020:1829-1

firefox Alpine 3.23, Alpine 3.22, Alpine 3.21 +9 more 82.0-r0
librewolf Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 82.0-r0
firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +9 more 78.5.0-r0
thunderbird Alpine 3.23, Alpine 3.22, Alpine 3.21 +5 more 78.5.1-r0

alpine advisories ALPINE-CVE-2020-15969

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

chromium Arch Linux 86.0.4240.75-1
firefox Arch Linux 82.0-1

arch linux advisories AVG-1238 AVG-1256

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-2020-15969 updated 2026-11-07 cvss 8.8

chromium-browser: Use after free in WebRTC

Red Hat Enterprise Linux 5 firefox, thunderbird
affected: no fix planned “Out of support scope”
Red Hat Enterprise Linux AppStream (v. 8) firefox 78.4.0-1.el8_2, thunderbird 78.4.0-1.el8_3
fixed: vendor fix RHSA-2020:4317
Red Hat Enterprise Linux AppStream E4S (v. 8.0) firefox 78.4.0-1.el8_0, thunderbird 78.4.0-1.el8_0
fixed: vendor fix RHSA-2020:4311
Red Hat Enterprise Linux AppStream EUS (v. 8.1) firefox 78.4.0-1.el8_1, thunderbird 78.4.0-1.el8_1
fixed: vendor fix RHSA-2020:4315
Red Hat Enterprise Linux AppStream EUS (v. 8.2) thunderbird 78.4.0-1.el8_2
fixed: vendor fix RHSA-2020:4948
Red Hat Enterprise Linux Client (v. 7) firefox 78.4.0-1.el7_9, thunderbird 78.4.0-1.el7_9 Red Hat Enterprise Linux Client Optional (v. 7) firefox 78.4.0-1.el7_9
fixed: vendor fix RHSA-2020:4310
Red Hat Enterprise Linux Desktop (v. 6) firefox 78.4.0-2.el6_10, thunderbird 78.4.0-1.el6_10 Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 78.4.0-2.el6_10
fixed: vendor fix RHSA-2020:4330
Red Hat Enterprise Linux Desktop Supplementary (v. 6) chromium-browser 86.0.4240.75-1.el6_10
fixed: vendor fix RHSA-2020:4235

show 12 more

Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 78.4.0-2.el6_10
fixed: vendor fix RHSA-2020:4330
Red Hat Enterprise Linux HPC Node Supplementary (v. 6) chromium-browser 86.0.4240.75-1.el6_10
fixed: vendor fix RHSA-2020:4235
Red Hat Enterprise Linux Server (v. 6) firefox 78.4.0-2.el6_10
fixed: vendor fix RHSA-2020:4330
Red Hat Enterprise Linux Server (v. 7) firefox 78.4.0-1.el7_9
fixed: vendor fix RHSA-2020:4310
Red Hat Enterprise Linux Server Optional (v. 6) firefox 78.4.0-2.el6_10, thunderbird 78.4.0-1.el6_10
fixed: vendor fix RHSA-2020:4330
Red Hat Enterprise Linux Server Optional (v. 7) firefox 78.4.0-1.el7_9, thunderbird 78.4.0-1.el7_9
fixed: vendor fix RHSA-2020:4310
Red Hat Enterprise Linux Server Supplementary (v. 6) chromium-browser 86.0.4240.75-1.el6_10
fixed: vendor fix RHSA-2020:4235
Red Hat Enterprise Linux Workstation (v. 6) firefox 78.4.0-2.el6_10, thunderbird 78.4.0-1.el6_10
fixed: vendor fix RHSA-2020:4330
Red Hat Enterprise Linux Workstation (v. 7) firefox 78.4.0-1.el7_9, thunderbird 78.4.0-1.el7_9
fixed: vendor fix RHSA-2020:4310
Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 78.4.0-2.el6_10
fixed: vendor fix RHSA-2020:4330
Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 78.4.0-1.el7_9
fixed: vendor fix RHSA-2020:4310
Red Hat Enterprise Linux Workstation Supplementary (v. 6) chromium-browser 86.0.4240.75-1.el6_10
fixed: vendor fix RHSA-2020:4235

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

1.74% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

Google Chrome

Classification

Weakness

CWE-416 Use After Free
CWE-787 Out-of-bounds Write

Technology feeds

Google Chrome rss critical rss

References

lists.opensuse.org /opensuse-security-announce/2020-11/msg00016.html
vendor-advisory, mailing-list, third-party-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/4GWCWNHTTYOH6HSFUXPGPBB6J6JYZHZE/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/24QFL4C3AZKMFVL7LVSYMU2DNE5VVUGS/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/SC3U3H6AISVZB5PLZLLNF4HMQ4UFFL7M/
vendor-advisory
debian.org /security/2021/dsa-4824
vendor-advisory, third-party-advisory
security.gentoo.org /glsa/202101-30
vendor-advisory, third-party-advisory
chromereleases.googleblog.com /2020/10/stable-channel-update-for-desktop.html
release-notes, vendor-advisory
crbug.com /1124659
permissions-required, vendor-advisory
support.apple.com /kb/HT212009
third-party-advisory
support.apple.com /kb/HT212011
third-party-advisory
support.apple.com /kb/HT212005
third-party-advisory
support.apple.com /kb/HT212003
third-party-advisory
support.apple.com /kb/HT212007
third-party-advisory
seclists.org /fulldisclosure/2020/Dec/27
mailing-list, third-party-advisory
seclists.org /fulldisclosure/2020/Dec/30
mailing-list, third-party-advisory
seclists.org /fulldisclosure/2020/Dec/24
mailing-list, third-party-advisory
seclists.org /fulldisclosure/2020/Dec/26
mailing-list, third-party-advisory
seclists.org /fulldisclosure/2020/Dec/29
mailing-list, third-party-advisory

Sources

CVE List CVE-2020-15969
NVD CVE-2020-15969

Fencer Vulns 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.

Summary