CVE-2020-12267
setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock.
setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock.
- Record
CVE-2020-12267- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-416
- Updated
- 2026-11-02
CVE List No score
setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock.
- Record
CVE-2020-12267- Updated
- 2026-11-02
EUVDEUVD-2020-4580 No score
setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock.
- Record
EUVD-2020-4580- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-96rj-cc48-wqpc
setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock.
setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock.
- Record
GHSA-96rj-cc48-wqpc- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
OSV
setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock.
- Record
CVE-2020-12267- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10975-1 No score
libQt5Bootstrap-devel-static-32bit-5.15.2+kde222-1.3 on GA media
These are all security issues fixed in the libQt5Bootstrap-devel-static-32bit-5.15.2+kde222-1.3 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10975-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libqt5-qtbaseopenSUSE:Tumbleweed From an advisory covering 3 CVEs |
before 5.15.2+kde222-1.3 | 5.15.2+kde222-1.3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-12267 is a critical vulnerability (CVSS 9.8) in Qt, published April 27, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.41%, the 84th percentile. No source names a fixed version.
References
bugs.chromium.org/p/oss-fuzz/issues/detail?id=20450
codereview.qt-project.org/c/qt/qtbase/+/291706
security.gentoo.org/glsa/202007-38
nvd.nist.gov/vuln/detail/CVE-2020-12267
github.com/advisories/GHSA-96rj-cc48-wqpc
suse.com/security/cve/CVE-2020-0570