Vulnerability Description
The x86_assign_hw_event function in arch/x86/kernel/cpu/perf_event.c in the Performance Events subsystem in the Linux kernel before 2.6.39 does not properly calculate counter values, which allows local users to cause a denial of service (panic) via the perf program.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 2.6.39 |
Related Weaknesses (CWE)
References
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39Broken Link
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://www.openwall.com/lists/oss-security/2011/07/06/4Mailing ListThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=719228Issue TrackingThird Party Advisory
- https://github.com/torvalds/linux/commit/fc66c5210ec2539e800e87d7b3a985323c7be96PatchThird Party Advisory
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39Broken Link
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://www.openwall.com/lists/oss-security/2011/07/06/4Mailing ListThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=719228Issue TrackingThird Party Advisory
- https://github.com/torvalds/linux/commit/fc66c5210ec2539e800e87d7b3a985323c7be96PatchThird Party Advisory
FAQ
What is CVE-2011-2521?
CVE-2011-2521 is a vulnerability with a CVSS score of 4.9 (MEDIUM). The x86_assign_hw_event function in arch/x86/kernel/cpu/perf_event.c in the Performance Events subsystem in the Linux kernel before 2.6.39 does not properly calculate counter values, which allows loca...
How severe is CVE-2011-2521?
CVE-2011-2521 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2011-2521?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.