CVE-2021-30509: fedoraproject fedora Out-of-bounds Write
Vulnerability summary
CVE-2021-30509 is a high (CVSS 8.8) Out-of-bounds Write vulnerability in fedoraproject fedora. EPSS estimates a 0.84% chance of exploitation in the next 30 days, higher than 57.8% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 8 · Related 7Timeline
- 04-06-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
Out of bounds write in Tab Strip in Google Chrome prior to 90.0.4430.212 allowed an attacker who convinced a user to install a malicious extension to perform an out of bounds memory write via a crafted HTML page and a crafted Chrome extension.
CVSS metrics
4 scores · 3 sources · 2 versions- 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
EPSS trend
Probability
0.84%
Chance of exploitation in the next 30 days
Percentile
58%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.84% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (crbug.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- chromium< 90.0.4430.212-1
Fedoraproject1 product
- fedoraEOL33 | 34
Google1 product
- chrome≥ unspecified, < 90.0.4430.212 | < 90.0.4430.212
Ubuntu1 product
- chromium-browser< 91.0.4472.77-0ubuntu0.18.04.1
4 vendors · 4 products
References
8 links- chromereleases.googleblog.com/2021/05/stable-channel-update-for-desktop.htmlX Refsource MISCRelease NotesVendor Advisory
