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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
Linux Kernel 3.1.8 - KVM Local Denial of Service
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| linux-kernel | affected | | |
| linux-kernel | 3.0 | affected | |
| linux-kernel | 3.0.1 | affected | |
| linux-kernel | 3.0.2 | affected | |
| linux-kernel | 3.0.3 | affected | |
| linux-kernel | 3.0.4 | affected | |
| linux-kernel | 3.0.5 | affected | |
| linux-kernel | 3.0.6 | affected | |
| linux-kernel | 3.0.7 | affected | |
| linux-kernel | 3.0.8 | affected | |
| linux-kernel | 3.0.9 | affected | |
| linux-kernel | 3.0.10 | affected | |
| linux-kernel | 3.0.11 | affected | |
| linux-kernel | 3.0.12 | affected | |
| linux-kernel | 3.0.13 | affected | |
| linux-kernel | 3.0.14 | affected | |
| linux-kernel | 3.0.15 | affected | |
| linux-kernel | 3.0.16 | affected | |
| linux-kernel | 3.0.17 | affected | |
| linux-kernel | 3.0.18 | affected | |
| linux-kernel | 3.0.19 | affected | |
| linux-kernel | 3.0.20 | affected | |
| linux-kernel | 3.0.21 | affected | |
| linux-kernel | 3.0.22 | affected | |
| linux-kernel | 3.0.23 | affected | |
| linux-kernel | 3.0.24 | affected | |
| linux-kernel | 3.0.25 | affected | |
| linux-kernel | 3.0.26 | affected | |
| linux-kernel | 3.0.27 | affected | |
| linux-kernel | 3.0.28 | affected | |
| linux-kernel | 3.0.29 | affected | |
| linux-kernel | 3.0.30 | affected | |
| linux-kernel | 3.0.31 | affected | |
| linux-kernel | 3.0.32 | affected | |
| linux-kernel | 3.0.33 | affected | |
| linux-kernel | 3.0.34 | affected | |
| linux-kernel | 3.1 | affected | |
| linux-kernel | 3.1.1 | affected | |
| linux-kernel | 3.1.2 | affected | |
| linux-kernel | 3.1.3 | affected | |
| linux-kernel | 3.1.4 | affected | |
| linux-kernel | 3.1.5 | affected | |
| linux-kernel | 3.1.6 | affected | |
| linux-kernel | 3.1.7 | affected | |
| linux-kernel | 3.1.8 | affected | |
| linux-kernel | 3.1.9 | affected | |
| linux-kernel | 3.1.10 | affected | |
| linux-kernel | 3.2 | affected | |
| linux-kernel | 3.2.1 | affected | |
| linux-kernel | 3.2.2 | affected | |
| linux-kernel | 3.2.3 | affected | |
| linux-kernel | 3.2.4 | affected | |
| linux-kernel | 3.2.5 | affected | |
| linux-kernel | 3.2.6 | affected | |
| linux-kernel | 3.2.7 | affected | |
| linux-kernel | 3.2.8 | affected | |
| linux-kernel | 3.2.9 | affected | |
| linux-kernel | 3.2.10 | affected | |
| linux-kernel | 3.2.11 | affected | |
| linux-kernel | 3.2.12 | affected | |
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
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.