CVE-2016-9381
Race condition in QEMU in Xen allows local x86 HVM guest OS administrators to gain privileges by changing certain data on shared rings, aka a "double fetch" vulnerability.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Race condition in QEMU in Xen allows local x86 HVM guest OS administrators to gain privileges by changing certain data on shared rings, aka a "double fetch" vulnerability.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.29% probability · 22th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- qemu/qemu · citrix/xenserver
- Source
- cve@mitre.org
EPSS 0.3% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/94476Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037344Third Party Advisory, VDB Entry
- http://xenbits.xen.org/xsa/advisory-197.htmlThird Party Advisory
- https://security.gentoo.org/glsa/201612-56Third Party Advisory
- https://support.citrix.com/article/CTX218775Third Party Advisory
- http://www.securityfocus.com/bid/94476Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037344Third Party Advisory, VDB Entry
- http://xenbits.xen.org/xsa/advisory-197.htmlThird Party Advisory
- https://security.gentoo.org/glsa/201612-56Third Party Advisory
- https://support.citrix.com/article/CTX218775Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.