CVE-2021-30623: fedoraproject fedora Use After Free
CVSS: 8.8v3.1HighModified
AliasesUBUNTU-CVE-2021-30623DEBIAN-CVE-2021-30623
Published 03-09-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-30623 is a high (CVSS 8.8) Use After Free vulnerability in fedoraproject fedora. EPSS estimates a 3.97% chance of exploitation in the next 30 days, higher than 90.3% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (NVD)EPSS score
3.97%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 6 · Related 6Timeline
- 03-09-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
Chromium: CVE-2021-30623 Use after free in Bookmarks
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 8.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 3 agree
- 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
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
3.97%
Chance of exploitation in the next 30 days
Percentile
90%
Versus all other CVEs
30-day change
0.00 pp
From 3.97% on 20-09-2026
20-09-202620-10-2026
EPSS score3.97%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft3 products
- edge≤ 93.0.961.38
- edge_chromium≤ 93.0.4577.63
- microsoft edge (chromium-based)unspecified
Debian1 product
- chromium< 93.0.4577.82-1
Fedoraproject1 product
- fedoraEOL35
Ubuntu1 product
- chromium-browser< 93.0.4577.63-0ubuntu0.18.04.1
4 vendors · 6 products
References
5 links
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-30623X Refsource MISCPatchVendor Advisory