What’s Vulnerable › Vulnerabilities

CVE-2016-9381

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-01-23 · updated 2026-06-17
• Weakness: CWE-362

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.

Affected products

• Citrix XenServer: 6.0.2, 6.2.0, 6.5, 7.0
• QEMU: through 2.7.1; 2.8.0-rc0

References

• http://www.securityfocus.com/bid/94476
• http://www.securitytracker.com/id/1037344
• http://xenbits.xen.org/xsa/advisory-197.html
• https://security.gentoo.org/glsa/201612-56
• https://support.citrix.com/article/CTX218775
• http://www.securityfocus.com/bid/94476
• http://www.securitytracker.com/id/1037344
• http://xenbits.xen.org/xsa/advisory-197.html
• https://security.gentoo.org/glsa/201612-56
• https://support.citrix.com/article/CTX218775

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