CVE-2021-45930
No exploitation reported by the sources we read.
- Published2022-01-01
- WeaknessCWE-787
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Qt SVG in Qt 5.0.0 through 5.15.2 and 6.0.0 through 6.2.1 has an out-of-bounds write in QtPrivate::QCommonArrayOps<QPainterPath::Element>::growAppend (called from QPainterPath::addPath and QPathClipper::intersect).
Timeline
dates in UTC- 2022-01-0101:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-45930?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-45930?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 34.x | = 34 | no fix published | NVD |
| 35.x | = 35 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.x | ≥ 5.0.0, ≤ 5.15.2 | no fix published | NVD |
| 6.x | ≥ 6.0.0, ≤ 6.2.1 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 9.0 | = 9.0 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- qt5-qtsvgAlmaLinux:8all versions · fixed in 5.15.2-4.el8and 2 other packages
Vendor advisories
qt: out-of-bounds write may lead to DoS
phonon-backend-gstreamer as a component of Red Hat Enterprise Linux 6 · qt as a component of Red Hat Enterprise Linux 6 · qt-demos as a component of Red Hat Enterprise Linux 6 · +29 more
Red Hat Security Advisory: qt5-qtsvg security update
Fix
- Vendor fix Red Hat Product Security RHSA-2022:1920 · 35 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
- No fix planned, says the vendor Red Hat Product Security CVE-2021-45930 · 32 productsOut of support scope
Advisories and patches
- github.comPatch
- github.comPatch
- github.comPatch
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.15.5read 2026-10-23
- NVDCVSS 2.04.3read 2026-10-23
- NVDweakness (CWE)CWE-787read 2026-10-23
- FIRST EPSSEPSS score1.3 %2026-10-23
- OSVaffected packages—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- Published
- 2022-01-01
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-45930?
Is CVE-2021-45930 actively exploited?
What is the CVSS score for CVE-2021-45930?
Running qt? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Go further
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.