What’s Vulnerable › Vulnerabilities

CVE-2017-12134

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-08-24 · updated 2026-06-17
• Weakness: CWE-682

Description

The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users to corrupt block device data streams and consequently obtain sensitive memory information, cause a denial of service, or gain host OS privileges by leveraging incorrect block IO merge-ability calculation.

Affected products

• Citrix XenServer: 6.0.2, 6.2.0, 6.5, 7.0, 7.1, 7.2 (and their updates)
• xen: all versions

References

• http://www.debian.org/security/2017/dsa-3981
• http://www.openwall.com/lists/oss-security/2017/08/15/4
• http://www.securityfocus.com/bid/100343
• http://www.securitytracker.com/id/1039176
• http://xenbits.xen.org/xsa/advisory-229.html
• https://bugzilla.redhat.com/show_bug.cgi?id=1477656
• https://security.gentoo.org/glsa/201801-14
• https://support.citrix.com/article/CTX225941
• https://usn.ubuntu.com/3655-1/
• https://usn.ubuntu.com/3655-2/
• http://www.debian.org/security/2017/dsa-3981
• http://www.openwall.com/lists/oss-security/2017/08/15/4

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