What’s Vulnerable › Vulnerabilities

CVE-2016-9382

• Severity: high (CVSS 7.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% 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-264

Description

Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.

Affected products

• Citrix XenServer: 6.0.2, 6.2.0, 6.5, 7.0
• xen: 4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.1.0 (+33)

References

• http://www.securityfocus.com/bid/94470
• http://www.securitytracker.com/id/1037341
• http://xenbits.xen.org/xsa/advisory-192.html
• https://security.gentoo.org/glsa/201612-56
• https://support.citrix.com/article/CTX218775
• http://www.securityfocus.com/bid/94470
• http://www.securitytracker.com/id/1037341
• http://xenbits.xen.org/xsa/advisory-192.html
• https://security.gentoo.org/glsa/201612-56
• https://support.citrix.com/article/CTX218775

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