CVE-2006-5755
First published: Sun Dec 31 2006(Updated: )
Linux kernel before 2.6.18, when running on x86_64 systems, does not properly save or restore EFLAGS during a context switch, which allows local users to cause a denial of service (crash) by causing SYSENTER to set an NT flag, which can trigger a crash on the IRET of the next task.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | <=2.6.17 |
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Reference Links
- http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.18-git13.log
- http://www.ubuntu.com/usn/usn-416-1
- http://secunia.com/advisories/24098
- http://www.securityfocus.com/archive/1/471457
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.18
- http://www.debian.org/security/2007/dsa-1381
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:171
- http://www.securityfocus.com/bid/26060
- http://secunia.com/advisories/25691
- http://secunia.com/advisories/26620
- http://secunia.com/advisories/26994
- http://www.redhat.com/support/errata/RHSA-2008-0957.html
- http://secunia.com/advisories/32485
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9554
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=658fdbef66e5e9be79b457edc2cbbb3add840aa9
- http://kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=658fdbef66e5e9be79b457edc2cbbb3add840aa9
Frequently Asked Questions
What is the severity of CVE-2006-5755?
CVE-2006-5755 has been classified as a high severity vulnerability due to its potential to cause a denial of service.
How do I fix CVE-2006-5755?
To fix CVE-2006-5755, upgrade the Linux kernel to version 2.6.18 or later.
Who is affected by CVE-2006-5755?
CVE-2006-5755 affects local users on x86_64 systems running Linux kernel versions prior to 2.6.18.
What could be the impact of exploiting CVE-2006-5755?
Exploiting CVE-2006-5755 can lead to a system crash due to improper handling of the EFLAGS during context switches.
Is there any workaround for CVE-2006-5755?
There are no known workarounds for CVE-2006-5755; updating the kernel is the recommended action.
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