Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other…
Priority LOW 38Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other products, mishandles OpenSSL's error queue, which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions, an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected, regardless of the Qt version.)
Why it matters now
EPSS 0.03062 87th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mumble:mumble:1.3.0:-:*:*:*:*:*:* | 1.3.0 | Vulnerable | Mumble |
| cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:* | 5.12.2 to before 5.12.9; 5.13.0 – 5.13.2; 5.14.0 – 5.14.2 | Vulnerable | qt |
| cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | 31 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 32 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* | 15.2 | Vulnerable | openSUSE |
- cpe:2.3:a:mumble:mumble:1.3.0:-:*:*:*:*:*:* Versions 1.3.0 Vulnerable ·Mumble
- cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:* Versions 5.12.2 to before 5.12.9; 5.13.0 – 5.13.2; 5.14.0 – 5.14.2 Vulnerable ·qt
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* Versions 15.2 Vulnerable ·openSUSE
Remediation
Red Hat 1 advisory
- RHSA-2020:4690 Released 2020-11-04 · Red Hat rating Moderateqt5-qtbase and qt5-qtwebsockets security and bug fix update
- Red Hat CodeReady Linux Builder (v. 8) qt5-qtbase-static-5.12.5-6.el8, qt5-qttools-static-5.12.5-2.el8
- Red Hat Enterprise Linux AppStream (v. 8) qt5-assistant-5.12.5-2.el8, qt5-designer-5.12.5-2.el8, qt5-doctools-5.12.5-2.el8 +21
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat CodeReady Linux Builder (v. 8) | Fixed | RHSA-2020:4690 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2020:4690 |
Timeline
- 2026-10-02 Threatist record created from CVE-2020-13962
- 2026-10-03 Alias added: GHSA-c4xh-w73g-qgf6
References
Sources
- CVE-2020-13962 · CVE Program
- CVE-2020-13962 · NVD
- FIRST EPSS
- GHSA-c4xh-w73g-qgf6 · GitHub Advisory Database · CC BY 4.0
- CVE-2020-13962 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences