CVE-2014-8594
The do_mmu_update function in arch/x86/mm.c in Xen 4.x through 4.4.x does not properly restrict updates to only PV page tables, which allows remote PV guests to cause a denial of service (NULL pointer dereference) by leveraging hardware emulation…
Does this matter?
Lower severity and a low EPSS score (2.22%). Track it; it rarely justifies an emergency change on its own.
Description
The do_mmu_update function in arch/x86/mm.c in Xen 4.x through 4.4.x does not properly restrict updates to only PV page tables, which allows remote PV guests to cause a denial of service (NULL pointer dereference) by leveraging hardware emulation services for HVM guests using Hardware Assisted Paging (HAP).
- CVSS 2.0
- 5.4 MEDIUMAV:N/AC:H/Au:N/C:N/I:N/A:C
- EPSS
- 2.22% probability · 82th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- opensuse/opensuse · debian/debian linux · xen/xen
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.htmlThird Party Advisory
- http://secunia.com/advisories/62672Permissions Required
- http://www.debian.org/security/2015/dsa-3140Third Party Advisory
- http://www.securityfocus.com/bid/71149
- http://xenbits.xen.org/xsa/advisory-109.htmlPatch, Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/98767
- https://security.gentoo.org/glsa/201504-04
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.htmlThird Party Advisory
- http://secunia.com/advisories/62672Permissions Required
- http://www.debian.org/security/2015/dsa-3140Third Party Advisory
- http://www.securityfocus.com/bid/71149
- http://xenbits.xen.org/xsa/advisory-109.htmlPatch, Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/98767
- https://security.gentoo.org/glsa/201504-04
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.