CVE-2017-12136

Severity: high (CVSS 7.8 v3.0)
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: 2017-08-24 · updated 2026-06-17
Weakness: CWE-362

Description

Race condition in the grant table code in Xen 4.6.x through 4.9.x allows local guest OS administrators to cause a denial of service (free list corruption and host crash) or gain privileges on the host via vectors involving maptrack free list handling.

Affected products

Citrix XenServer: 6.0.2, 6.2.0, 6.5, 7.0, 7.1, 7.2
Debian Linux: 8.0, 9.0
xen: 4.6.0, 4.6.1, 4.6.3, 4.6.4, 4.6.5, 4.6.6 (+7)

References

http://www.debian.org/security/2017/dsa-3969
http://www.openwall.com/lists/oss-security/2017/08/15/3
http://www.securityfocus.com/bid/100346
http://www.securitytracker.com/id/1039175
http://xenbits.xen.org/xsa/advisory-228.html
https://bugzilla.redhat.com/show_bug.cgi?id=1477651
https://security.gentoo.org/glsa/201801-14
https://support.citrix.com/article/CTX225941
http://www.debian.org/security/2017/dsa-3969
http://www.openwall.com/lists/oss-security/2017/08/15/3
http://www.securityfocus.com/bid/100346
http://www.securitytracker.com/id/1039175

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