CVE-2021-45482: webkitgtk Use After Free
CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2021-45482DEBIAN-CVE-2021-45482
Published 25-12-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-45482 is a medium (CVSS 6.5) Use After Free vulnerability in webkitgtk. EPSS estimates a 1.53% chance of exploitation in the next 30 days, higher than 74.3% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
1.53%
0%100%
Low · +0.11 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 8 · Related 4Timeline
- 25-12-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
In WebKitGTK before 2.32.4, there is a use-after-free in WebCore::ContainerNode::firstChild, a different vulnerability than CVE-2021-30889.
CVSS metrics
4 scores · 3 sources · 2 versionsMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.53%
Chance of exploitation in the next 30 days
Percentile
74%
Versus all other CVEs
30-day change
+0.11 pp
From 1.43% on 18-09-2026
18-09-202618-10-2026
EPSS score1.53%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundSecurity Advisories
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Ubuntu5 products
- qtwebkit-opensource-srcAll versions (No fix recorded)
- qtwebkit-sourceAll versions (No fix recorded)
- webkit2gtkAll versions (No fix recorded) | < 2.32.4-0ubuntu0.18.04.1 | < 2.32.4-0ubuntu0.20.04.1
- webkitgtkAll versions (No fix recorded)
- wpewebkitAll versions (No fix recorded)
Debian2 products
- webkit2gtk< 2.32.4-1
- wpewebkit< 2.32.4-1
Webkitgtk1 product
- webkitgtk< 2.32.4
3 vendors · 8 products
References
5 links- github.com/ChijinZ/security_advisories/tree/master/webkitgtk-2.32.3X Refsource MISCREPORTExploitThird Party Advisory
