CVE-2021-21148: Google Chromium V8 Heap Buffer Overflow Vulnerability
CVSS: 8.8v3.1HighKEVAnalyzed
AliasesALPINE-CVE-2021-21148openSUSE-SU-2021:0276-1UBUNTU-CVE-2021-21148DEBIAN-CVE-2021-21148openSUSE-SU-2021:0267-1openSUSE-SU-2021:0296-1
Published 09-02-2021Last modified 21-10-2025
Vulnerability summary
CVE-2021-21148 is a high (CVSS 8.8) Out-of-bounds Write vulnerability in Google Chromium V8. It is known to be exploited: CISA lists it, first on 03-11-2021. EPSS estimates a 19.97% chance of exploitation in the next 30 days, higher than 97.4% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (CVE.org)EPSS score
19.97%
0%100%
Medium · 0.00 pp in 30 daysKEVListedCISA
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 8 · Related 6Timeline
- 09-02-2021PublishedVulnerability first disclosed.
- 03-11-2021Added to CISA KEVGoogle Chromium V8 Heap Buffer Overflow Vulnerability
- 17-11-2021CISA remediation dueApply updates per vendor instructions.
- 21-10-2025Last modifiedVulnerability information updated.
Description
Heap buffer overflow in V8 in Google Chrome prior to 88.0.4324.150 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
CVSS metrics
6 scores · 5 sources · 2 versionsHigh 8.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 5 agree
- OSV · AlpineEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
19.97%
Chance of exploitation in the next 30 days
Percentile
97%
Versus all other CVEs
30-day change
0.00 pp
From 19.97% on 20-09-2026
20-09-202620-10-2026
EPSS score19.97%
Known exploited
Compare KEV catalogs
CISA KEVListed- Added
- 03-11-2021
- Federal due date
- 17-11-2021
CISA required action
Apply updates per vendor instructions. nvd.nist.gov/vuln/detail/CVE-2021-21148
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- chromium< 88.0.4324.150-1
- debian_linuxEOL10.0
Opensuse2 products
- chromium&distro=openSUSE Leap 15.2< 88.0.4324.150-lp152.2.72.1
- opera&distro=openSUSE Leap 15.2 NonFree< 74.0.3911.107-lp152.2.34.1
Alpine1 product
- nodejs< 14.15.5-r0
Fedoraproject1 product
- fedoraEOL32 | 33
Google1 product
- chrome≥ unspecified, < 88.0.4324.150 | < 88.0.4324.150
Suse1 product
- chromium&distro=SUSE Package Hub 15 SP2< 88.0.4324.150-bp152.2.59.1
Ubuntu1 product
- chromium-browser< 89.0.4389.82-0ubuntu0.16.04.1 | < 89.0.4389.82-0ubuntu0.18.04.1
7 vendors · 9 products
References
18 links- chromereleases.googleblog.com/2021/02/stable-channel-update-for-desktop_4.htmlX Refsource MISCREPORTRelease Notes
www.debian.org/security/2021/dsa-4858Vendor AdvisoryX Refsource DEBIANMailing ListThird Party Advisory- packetstormsecurity.com/files/162579/Chrome-Array-Transfer-Bypass.htmlX Refsource MISCThird Party AdvisoryVDB Entry
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21148Government ResourceUS Government Resource
- lists.opensuse.org/archives/…Advisory
Show all 18 references
- lists.opensuse.org/archives/…Advisory
- lists.opensuse.org/archives/…Advisory