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Vulnerability details: VCID-3mws-4qb4-aaae
Vulnerability ID VCID-3mws-4qb4-aaae
Aliases CVE-2021-21206
Summary Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Status Published
Exploitability 2.0
Weighted Severity 8.0
Risk 10.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-21206.html
epss 0.03993 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.03993 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.03993 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.03993 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.03993 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.03993 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.03993 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.03993 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.03993 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.03993 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.03993 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.03993 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.04100 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.04100 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.04100 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.04100 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.22657 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.25239 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
epss 0.44172 https://api.first.org/data/v1/epss?cve=CVE-2021-21206
cvssv3.1 8.8 https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop.html
ssvc Attend https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop.html
cvssv3.1 8.8 https://crbug.com/1196781
cvssv3.1 8.8 https://crbug.com/1196781
ssvc Attend https://crbug.com/1196781
ssvc Attend https://crbug.com/1196781
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21206
cvssv3.1 8.8 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/
ssvc Attend https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/
cvssv3.1 8.8 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/
ssvc Attend https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/
cvssv3.1 8.8 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/
ssvc Attend https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-21206
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-21206
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-21206
archlinux High https://security.archlinux.org/AVG-1816
archlinux High https://security.archlinux.org/AVG-1817
archlinux High https://security.archlinux.org/AVG-1818
cvssv3.1 8.8 https://security.gentoo.org/glsa/202104-08
ssvc Attend https://security.gentoo.org/glsa/202104-08
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-21206.html
https://api.first.org/data/v1/epss?cve=CVE-2021-21206
https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop.html
https://crbug.com/1196781
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21206
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/
https://security.gentoo.org/glsa/202104-08
987053 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=987053
AVG-1816 https://security.archlinux.org/AVG-1816
AVG-1817 https://security.archlinux.org/AVG-1817
AVG-1818 https://security.archlinux.org/AVG-1818
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
CVE-2021-21206 https://nvd.nist.gov/vuln/detail/CVE-2021-21206
Data source KEV
Date added Nov. 3, 2021
Description Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
Required action Apply updates per vendor instructions.
Due date Nov. 17, 2021
Note 
https://nvd.nist.gov/vuln/detail/CVE-2021-21206
Ransomware campaign use Unknown
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-02-04T15:02:34Z/ Found at https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://crbug.com/1196781
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://crbug.com/1196781
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-02-04T15:02:34Z/ Found at https://crbug.com/1196781
Vector: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-02-04T15:02:34Z/ Found at https://crbug.com/1196781
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-02-04T15:02:34Z/ Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-02-04T15:02:34Z/ Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-02-04T15:02:34Z/ Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-21206
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-21206
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-21206
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://security.gentoo.org/glsa/202104-08
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-02-04T15:02:34Z/ Found at https://security.gentoo.org/glsa/202104-08
Exploit Prediction Scoring System (EPSS)
Percentile 0.92271
EPSS Score 0.03993
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.