Candidate: CVE-2007-5093
References: 
 http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6-stable.git;a=commitdiff;h=852ffe0acf89f959e8d35080bbd2bdc2d8f2e9e5
 http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.22.y.git;a=commitdiff;h=85237f202d46d55c1bffe0c5b1aa3ddc0f1dce4d
 MLIST:20070902 Oops in pwc v4l driver
 URL:http://marc.info/?l=linux-kernel&m=118873457814808&w=2
 MLIST:20070903 Re: Oops in pwc v4l driver
 URL:http://marc.info/?l=linux-kernel&m=118880154122548&w=2
 CONFIRM:http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22.6
 BID:25504
 URL:http://www.securityfocus.com/bid/25504 
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.
Ubuntu-Description: 
 The Philips USB Webcam driver did not correctly handle disconnects.
 If a local attacker tricked another user into disconnecting a webcam
 unsafely, the kernel could hang or consume CPU resources, leading to
 a denial of service.
Notes: 
 kees> debug regression was fixed in http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.22.y.git;a=commitdiff;h=a3a066bffd7754e6d40c48972e698352f6cd6ce4
Bugs: 
upstream: released (2.6.22.6)
linux-2.6: released (2.6.23-1)
2.6.18-etch-security: released (2.6.18.dfsg.1-13etch4) [bugfix/usb-pwc-disconnect-block.patch]
2.6.8-sarge-security: released (2.6.8-17sarge1) [usb-pwc-disconnect-block.dpatch]
2.4.27-sarge-security: released (2.4.17-10sarge6) [263_usb-pwc-disconnect-block.diff]
2.6.15-dapper-security: released (2.6.15-29.61)
2.6.17-edgy-security: released (2.6.17.1-12.42)
2.6.20-feisty-security: released (2.6.20-16.33)
2.6.22-gutsy-security: N/A