CVE-2020-9951

mediumpriority · track · 36EPSS 0.023 · 83 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.33% (83rd) EPSS

CVSS 6.8 · medium

Is it mine?

1,271 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

A use after free issue was addressed with improved memory management. This issue is fixed in Safari 14.0. Processing maliciously crafted web content may lead to arbitrary code execution.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedwebkit2gtk3-0:2.30.4-1.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-0:2.30.4-1.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-0:2.30.4-1.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-0:2.30.4-1.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-0:2.30.4-1.el8.src as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-0:2.30.4-1.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-debuginfo-0:2.30.4-1.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-debuginfo-0:2.30.4-1.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-debuginfo-0:2.30.4-1.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-debuginfo-0:2.30.4-1.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-debuginfo-0:2.30.4-1.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-debugsource-0:2.30.4-1.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-debugsource-0:2.30.4-1.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-debugsource-0:2.30.4-1.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-debugsource-0:2.30.4-1.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-debugsource-0:2.30.4-1.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-devel-0:2.30.4-1.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-devel-0:2.30.4-1.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-devel-0:2.30.4-1.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-devel-0:2.30.4-1.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-devel-0:2.30.4-1.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-devel-debuginfo-0:2.30.4-1.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-devel-debuginfo-0:2.30.4-1.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-devel-debuginfo-0:2.30.4-1.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-devel-debuginfo-0:2.30.4-1.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-devel-debuginfo-0:2.30.4-1.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-0:2.30.4-1.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-0:2.30.4-1.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-0:2.30.4-1.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-0:2.30.4-1.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-0:2.30.4-1.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-debuginfo-0:2.30.4-1.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-debuginfo-0:2.30.4-1.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-debuginfo-0:2.30.4-1.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-debuginfo-0:2.30.4-1.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-debuginfo-0:2.30.4-1.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-devel-0:2.30.4-1.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-devel-0:2.30.4-1.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-devel-0:2.30.4-1.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-devel-0:2.30.4-1.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-devel-0:2.30.4-1.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-devel-debuginfo-0:2.30.4-1.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-devel-debuginfo-0:2.30.4-1.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-devel-debuginfo-0:2.30.4-1.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-devel-debuginfo-0:2.30.4-1.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedwebkit2gtk3-jsc-devel-debuginfo-0:2.30.4-1.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–8.8

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.18.8highAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · Red Hat Product Security US

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-416USprimaryCWE-416USCWE-416US

affected products (1,271)

Products and version ranges known to be affected.

IBM InfoSphere Information Serverall versionscert_bundDEcpe:/a:ibm:infosphere_information_server:-
IBM QRadar SIEM 7.3all versionscert_bundDEcpe:/a:ibm:qradar_siem:7.3
IBM QRadar SIEM 7.4all versionscert_bundDEcpe:/a:ibm:qradar_siem:7.4
IBM QRadar SIEM 7.5.0all versionscert_bundDEcpe:/a:ibm:qradar_siem:7.5.0
Apple Safariunspecified → Safari 14.0enisa_euvdEU
Apple Inc. Safari≤ 14.0fstec_bduRU
АО «НППКТ» ОСОН ОСнова Оnyx≤ 2.1fstec_bduRU
apple icloud< 11.5nvdUScpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:*
apple ipados< 14.0nvdUScpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple iphone os< 14.0nvdUScpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple itunes< 12.10.9nvdUScpe:2.3:a:apple:itunes:*:*:*:*:*:*:*:*
apple safari< 14.0nvdUScpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
apple tvos< 14.0nvdUScpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
apple watchos< 7.0nvdUScpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
debian debian linux= 10.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
webkit webkitgtk+≤ 2.30.3nvdUScpe:2.3:a:webkit:webkitgtk\+:*:*:*:*:*:*:*:*
OpenEXR-0:2.2.0-12.el8.src as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debuginfo-0:2.2.0-12.el8.aarch64 as a component of Red Hat CodeReady Linux Builder (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debuginfo-0:2.2.0-12.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debuginfo-0:2.2.0-12.el8.i686 as a component of Red Hat CodeReady Linux Builder (v. 8)all versionsnot affectedredhat_csafUS

showing 20 of 1,271

advisories (2)

Vendor and ecosystem advisories describing this.

RHSA-2021:1586Red Hat Security Advisory: GNOME security, bug fix, and enhancement update2021-05-18csaf · redhat_csafUS
An update for GNOME is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
WID-SEC-W-2025-0227IBM QRadar SIEM: Mehrere SchwachstellenDeutsch2021-11-30csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in IBM QRadar SIEM ausnutzen, um seine Privilegien zu erweitern, Administratorrechte zu erlangen, beliebigen Programmcode auszuführen, Informationen offenzulegen, Dateien zu manipulieren oder Sicherheitsvorkehrungen zu umgehen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd redhat_csaf NVD CVE.org MITRE

published 2020-10-16modified 2026-06-17

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+12230 more

references (65)

External citations — patches, advisories, analysis.

scry

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