CVE-2012-0045

Severity: medium (CVSS 4.7 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2012-07-03 · updated 2026-06-16

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.

Affected products

Linux kernel: through 3.2.13; 3.0-rc1, 3.0-rc2, 3.0-rc3, 3.0-rc4, 3.0-rc5, 3.0-rc6 (+63)

References

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

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