CVE-2021-30518: fedoraproject fedora Out-of-bounds Write
Vulnerability summary
CVE-2021-30518 is a high (CVSS 8.8) Out-of-bounds Write vulnerability in fedoraproject fedora. EPSS estimates a 1.34% chance of exploitation in the next 30 days, higher than 71.4% 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
Heap buffer overflow in Reader Mode in Google Chrome prior to 90.0.4430.212 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
CVSS metrics
5 scores · 4 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
- OSV · AlpineEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.34%
Chance of exploitation in the next 30 days
Percentile
71%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.34% 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.
Alpine1 product
- qt5-qtwebengine< 5.15.3_git20210510-r1
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
5 vendors · 5 products
References
9 links- chromereleases.googleblog.com/2021/05/stable-channel-update-for-desktop.htmlX Refsource MISCRelease NotesVendor Advisory
