CVE-2020-12267: qt Use After Free
CVSS: 9.8v3.1CriticalModified
Published 27-04-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-12267 is a critical (CVSS 9.8) Use After Free vulnerability in qt. EPSS estimates a 2.41% chance of exploitation in the next 30 days, higher than 83.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
2.41%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 27-04-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock.
CVSS metrics
2 scores · 1 source · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
2.41%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
0.00 pp
From 2.41% on 19-09-2026
19-09-202619-10-2026
EPSS score2.41%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugs.chromium.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Qt1 product
- qtEOL5.14.1
1 vendor · 1 product
References
3 links- bugs.chromium.org/p/oss-fuzz/issues/detail?id=20450X Refsource MISCExploitIssue TrackingThird Party Advisory