CVE-2009-3722
The handle_dr function in arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 2.6.31.1 does not properly verify the Current Privilege Level (CPL) before accessing a debug register, which allows guest OS users to cause a denial of service…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.28%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The handle_dr function in arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 2.6.31.1 does not properly verify the Current Privilege Level (CPL) before accessing a debug register, which allows guest OS users to cause a denial of service (trap) on the host OS via a crafted application.
- CVSS 2.0
- 7.1 HIGHAV:N/AC:M/Au:N/C:N/I:N/A:C
- EPSS
- 2.28% probability · 82th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-264
- Affected
- linux/linux kernel
- Source
- secalert@redhat.com
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0a79b009525b160081d75cef5dbf45817956acf2
- http://marc.info/?l=oss-security&m=125678631403558&w=2
- http://marc.info/?l=oss-security&m=125680666827148&w=2
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30.9Vendor Advisory
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.1Vendor Advisory
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc1Vendor Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:198
- http://www.redhat.com/support/errata/RHSA-2010-0126.html
- http://www.securityfocus.com/bid/37221
- http://www.ubuntu.com/usn/usn-864-1
- https://bugzilla.redhat.com/show_bug.cgi?id=531660
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9892
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0a79b009525b160081d75cef5dbf45817956acf2
- http://marc.info/?l=oss-security&m=125678631403558&w=2
- http://marc.info/?l=oss-security&m=125680666827148&w=2
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30.9Vendor Advisory
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.1Vendor Advisory
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc1Vendor Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:198
- http://www.redhat.com/support/errata/RHSA-2010-0126.html
- http://www.securityfocus.com/bid/37221
- http://www.ubuntu.com/usn/usn-864-1
- https://bugzilla.redhat.com/show_bug.cgi?id=531660
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9892
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.