What’s Vulnerable › Vulnerabilities

CVE-2017-17563

• 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: 2017-12-12 · updated 2026-06-17
• Weakness: CWE-119

Description

An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an incorrect mask for reference-count overflow checking in shadow mode.

Affected products

• xen: through 4.9.1

References

• http://www.openwall.com/lists/oss-security/2017/12/12/2
• http://www.securityfocus.com/bid/102169
• http://www.securitytracker.com/id/1040769
• https://lists.debian.org/debian-lts-announce/2018/01/msg00003.html
• https://lists.debian.org/debian-lts-announce/2018/10/msg00009.html
• https://security.gentoo.org/glsa/201801-14
• https://support.citrix.com/article/CTX232096
• https://www.debian.org/security/2018/dsa-4112
• https://xenbits.xen.org/xsa/advisory-249.html
• http://www.openwall.com/lists/oss-security/2017/12/12/2
• http://www.securityfocus.com/bid/102169
• http://www.securitytracker.com/id/1040769

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