CVE-2012-0045

Description

The em_syscall function in arch/x86/kvm/emulate.c in the KVM implementation in the Linux kernel before 3.2.14 does not properly handle the 0f05 (aka syscall) opcode, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application, as demonstrated by an NASM file.

CVSS Metrics

• v2.0•MEDIUM•Score: 4.7AV:L/AC:M/Au:N/C:N/I:N/A:C

EPSS Trends

Current EPSS score: 0.78%• Percentile: 74%

Affected Systems

• linux•linux_kernel

  ≤ 3.2.13 | 3.0:rc1 | 3.0:rc2 | 3.0:rc3 | 3.0:rc4 | 3.0:rc5 | 3.0:rc6 | 3.0:rc7 | 3.0.1 | 3.0.2 | 3.0.3 | 3.0.4 | 3.0.5 | 3.0.6 | 3.0.7 | 3.0.8 | 3.0.9 | 3.0.10 | 3.0.11 | 3.0.12 | 3.0.13 | 3.0.14 | 3.0.15 | 3.0.16 | 3.0.17 | 3.0.18 | 3.0.19 | 3.0.20 | 3.0.21 | 3.0.22 | 3.0.23 | 3.0.24 | 3.0.25 | 3.0.26 | 3.0.27 | 3.0.28 | 3.0.29 | 3.0.30 | 3.0.31 | 3.0.32 | 3.0.33 | 3.0.34 | 3.1 | 3.1:rc1 | 3.1:rc2 | 3.1:rc3 | 3.1:rc4 | 3.1.1 | 3.12 | 3.13 | 3.14 | 3.15 | 3.16 | 3.17 | 3.18 | 3.19 | 3.1.10 | 3.2 | 3.2.1 | 3.2.2 | 3.2.3 | 3.2.4 | 3.2.5 | 3.2.6 | 3.2.7 | 3.2.8 | 3.2.9 | 3.2.10 | 3.2.11 | 3.2.12

References (6)

• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.14
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c2226fc9e87ba3da060e47333657cd6616652b84
• https://bugzilla.redhat.com/show_bug.cgi?id=773370
• http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html
• http://www.openwall.com/lists/oss-security/2012/01/12/2
• https://github.com/torvalds/linux/commit/c2226fc9e87ba3da060e47333657cd6616652b84