CVE-2021-38593
Qt 5.x before 5.15.6 and 6.x through 6.1.2 has an out-of-bounds write in QOutlineMapper::convertPath (called from QRasterPaintEngine::fill and QPaintEngineEx::stroke).
02 Description
Qt 5.x before 5.15.6 and 6.x through 6.1.2 has an out-of-bounds write in QOutlineMapper::convertPath (called from QRasterPaintEngine::fill and QPaintEngineEx::stroke).
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 3.00% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 86.8% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-08-12 00:00Z5 YR AGO
- Last updated
- 2024-08-04 01:44Z2 YR AGO
- Reserved
- 2021-08-12
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-787Out-of-bounds WriteBase
- Data version
- 5.1
- Document digest
- b0a50c8c4df393509070de8fdd6be3c7b38cabdb5615873ffa141ec9d2b666d4
05 Affected products
06 References
- github.comhttps://github.com/qt/qtbase/commit/6b400e3147dcfd8cc3a393ace1bd118c93762e0c
- github.comhttps://github.com/qt/qtbase/commit/202143ba41f6ac574f1858214ed8bf4a38b73ccd
- github.comhttps://github.com/qt/qtbase/commit/1ca02cf2879a5e1511a2f2109f0925cf4c892862
- bugs.chromium.orghttps://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35566
- github.comhttps://github.com/google/oss-fuzz-vulns/blob/main/vulns/qt/OSV-2021-903.yaml
- www.qt.iohttps://www.qt.io/blog/qt-5.15-extended-support-for-subscription-license-holders
- wiki.qt.iohttps://wiki.qt.io/Qt_5.15_Release#Known_Issues
- lists.fedoraproject.orgFEDORA-2022-54760f7fa4https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36VN2WKMNQUSTF6ZW2X52NPAJVXJ4S5I/
- lists.fedoraproject.orgFEDORA-2022-4131ced81ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HY5YCSDCTLHVMP3OXOM6HNTWHV6DBHDX/
- security.gentoo.orgGLSA-202402-03https://security.gentoo.org/glsa/202402-03
07 Fixed in
AlmaLinux 8
- qt5-qtbase Fixed in 5.15.2-4.el8
- qt5-qtbase-common Fixed in 5.15.2-4.el8
- qt5-qtbase-devel Fixed in 5.15.2-4.el8
- qt5-qtbase-examples Fixed in 5.15.2-4.el8
- qt5-qtbase-gui Fixed in 5.15.2-4.el8
- qt5-qtbase-mysql Fixed in 5.15.2-4.el8
- qt5-qtbase-odbc Fixed in 5.15.2-4.el8
- qt5-qtbase-postgresql Fixed in 5.15.2-4.el8
- qt5-qtbase-private-devel Fixed in 5.15.2-4.el8
- qt5-qtbase-static Fixed in 5.15.2-4.el8
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Arch Linux
- qt5-base Fixed in 5.15.2+kde+r222-1
- qt6-base Fixed in 6.1.3-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
CloudLinux 8
- qt5-qtbase Fixed in 5.15.2-4.el8
- qt5-qtbase-common Fixed in 5.15.2-4.el8
- qt5-qtbase-devel Fixed in 5.15.2-4.el8
- qt5-qtbase-examples Fixed in 5.15.2-4.el8
- qt5-qtbase-gui Fixed in 5.15.2-4.el8
- qt5-qtbase-mysql Fixed in 5.15.2-4.el8
- qt5-qtbase-odbc Fixed in 5.15.2-4.el8
- qt5-qtbase-postgresql Fixed in 5.15.2-4.el8
- qt5-qtbase-private-devel Fixed in 5.15.2-4.el8
- qt5-qtbase-static Fixed in 5.15.2-4.el8
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- qtbase-opensource-src-gles No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- qtbase-opensource-src Fixed in 5.9.5+dfsg-0ubuntu2.6
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- qtbase-opensource-src Fixed in 5.12.8+dfsg-0ubuntu2.1
- qtbase-opensource-src-gles No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- qtbase-opensource-src-gles No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- qtbase-opensource-src-gles No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- qtbase-opensource-src-gles No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- qtbase-opensource-src-gles No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- qtbase-opensource-src-gles No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.