CVE-2014-8481
The instruction decoder in arch/x86/kvm/emulate.c in the KVM subsystem in the Linux kernel before 3.18-rc2 does not properly handle invalid instructions, which allows guest OS users to cause a denial of service (NULL pointer dereference and host OS…
Does this matter?
Lower severity and a low EPSS score (0.58%). Track it; it rarely justifies an emergency change on its own.
Description
The instruction decoder in arch/x86/kvm/emulate.c in the KVM subsystem in the Linux kernel before 3.18-rc2 does not properly handle invalid instructions, which allows guest OS users to cause a denial of service (NULL pointer dereference and host OS crash) via a crafted application that triggers (1) an improperly fetched instruction or (2) an instruction that occupies too many bytes. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-8480.
- CVSS 2.0
- 4.9 MEDIUMAV:L/AC:L/Au:N/C:N/I:N/A:C
- EPSS
- 0.58% probability · 46th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-399
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a430c9166312e1aa3d80bce32374233bdbfeba32
- http://secunia.com/advisories/62042
- http://thread.gmane.org/gmane.comp.emulators.kvm.devel/128427
- http://www.openwall.com/lists/oss-security/2014/10/23/7Exploit
- https://bugzilla.redhat.com/show_bug.cgi?id=1156615
- https://github.com/torvalds/linux/commit/a430c9166312e1aa3d80bce32374233bdbfeba32Exploit
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a430c9166312e1aa3d80bce32374233bdbfeba32
- http://secunia.com/advisories/62042
- http://thread.gmane.org/gmane.comp.emulators.kvm.devel/128427
- http://www.openwall.com/lists/oss-security/2014/10/23/7Exploit
- https://bugzilla.redhat.com/show_bug.cgi?id=1156615
- https://github.com/torvalds/linux/commit/a430c9166312e1aa3d80bce32374233bdbfeba32Exploit
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.