CVE-2012-3516

The GNTTABOP_swap_grant_ref sub-operation in the grant table hypercall in Xen 4.2 and Citrix XenServer 6.0.2 allows local guest kernels or administrators to cause a denial of service (host crash) and possibly gain privileges via a crafted grant reference that triggers a write to an arbitrary hypervisor memory location.

• CWE-264

• http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
• http://secunia.com/advisories/50472Vendor Advisory
• http://secunia.com/advisories/50530Vendor Advisory
• http://support.citrix.com/article/CTX134708Patch, Vendor Advisory
• http://wiki.xen.org/wiki/Security_Announcements#XSA-18_grant_table_entry_swaps_have_inadequate_bounds_checking
• http://www.openwall.com/lists/oss-security/2012/09/05/11
• http://www.securityfocus.com/bid/55411
• http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
• http://secunia.com/advisories/50472Vendor Advisory
• http://secunia.com/advisories/50530Vendor Advisory
• http://support.citrix.com/article/CTX134708Patch, Vendor Advisory
• http://wiki.xen.org/wiki/Security_Announcements#XSA-18_grant_table_entry_swaps_have_inadequate_bounds_checking
• http://www.openwall.com/lists/oss-security/2012/09/05/11
• http://www.securityfocus.com/bid/55411

Published

Nov 23, 2012

Last Modified

Jun 16, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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