CVE-2018-19966

An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service host OS crash or possibly gain host OS privileges because of an interpretation conflict for a union data structure associated with shadow paging. NOTE: this issue exists because of an incorre...

CVE-2018-19963

An issue was discovered in Xen 4.11 allowing HVM guest OS users to cause a denial of service host OS crash or possibly gain host OS privileges because x86 IOREQ server resource accounting for external emulators was mishandled...

Xen Denial of Service Vulnerability (CNVD-2019-07946)

Xen is an open source virtual machine monitor developed by the Xen Project. Xen 4.11.x suffers from a denial of service vulnerability that stems from p2m locking being indefinitely unavailable under certain error conditions, which can be exploited by users of x86 client operating systems to cause...

Design/Logic Flaw

An issue was discovered in Xen 4.11.x allowing x86 guest OS users to cause a denial of service host OS hang because the p2m lock remains unavailable indefinitely in certain error conditions...

CVE-2018-19963

An issue was discovered in Xen 4.11 allowing HVM guest OS users to cause a denial of service host OS crash or possibly gain host OS privileges because x86 IOREQ server resource accounting for external emulators was mishandled...

CVE-2018-19964

An issue was discovered in Xen 4.11.x allowing x86 guest OS users to cause a denial of service host OS hang because the p2m lock remains unavailable indefinitely in certain error conditions...

Code injection

An issue was discovered in Xen 4.11 allowing HVM guest OS users to cause a denial of service host OS crash or possibly gain host OS privileges because x86 IOREQ server resource accounting for external emulators was mishandled...

CVE-2018-19963

An issue was discovered in Xen 4.11 allowing HVM guest OS users to cause a denial of service host OS crash or possibly gain host OS privileges because x86 IOREQ server resource accounting for external emulators was mishandled...

CVE-2018-19964

An issue was discovered in Xen 4.11.x allowing x86 guest OS users to cause a denial of service host OS hang because the p2m lock remains unavailable indefinitely in certain error conditions...

CVE-2018-19965

An issue was discovered in Xen through 4.11.x allowing 64-bit PV guest OS users to cause a denial of service host OS crash because GP0 can occur after a non-canonical address is passed to the TLB flushing code. NOTE: this issue exists because of an incorrect CVE-2017-5754 aka Meltdown mitigation...

CVE-2018-19964

An issue was discovered in Xen 4.11.x allowing x86 guest OS users to cause a denial of service host OS hang because the p2m lock remains unavailable indefinitely in certain error conditions...

CVE-2018-19964

An issue was discovered in Xen 4.11.x allowing x86 guest OS users to cause a denial of service host OS hang because the p2m lock remains unavailable indefinitely in certain error conditions...

CVE-2018-19965

Technical details about CVE-2018-19965 (Xen) are not provided in the connected documents. The initial description lacks vendor/product/version/root-cause/fix specifics. Monitor for updates from Xen advisories.

CVE-2018-19964

The CVE-2018-19964 issue affects Xen 4.11.x. It is caused by the p2m lock remaining unavailable indefinitely under certain error conditions, allowing a local x86 guest OS user to trigger a host denial-of-service (host hang). Nessus/NASL references describe this as an unpatched vulnerability for L...

CVE-2018-19964

An issue was discovered in Xen 4.11.x allowing x86 guest OS users to cause a denial of service host OS hang because the p2m lock remains unavailable indefinitely in certain error conditions...

CVE-2018-19961

An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because TLB flushes do not always occur after IOMMU mapping changes...

CVE-2018-19963

An issue was discovered in Xen 4.11 allowing HVM guest OS users to cause a denial of service host OS crash or possibly gain host OS privileges because x86 IOREQ server resource accounting for external emulators was mishandled...

CVE-2018-19963

An issue was discovered in Xen 4.11 allowing HVM guest OS users to cause a denial of service host OS crash or possibly gain host OS privileges because x86 IOREQ server resource accounting for external emulators was mishandled...

resource accounting issues in x86 IOREQ server handling

ISSUE DESCRIPTION Allocation of pages used to communicate with external emulators did not follow certain principles that are required for proper life cycle management of guest exposed pages. IMPACT A compromised DM stubdomain may cause Xen to crash, resulting in a DoS Denial of Service affecting...

x86: incorrect error handling for guest p2m page removals

ISSUE DESCRIPTION The internal function querying a domain's p2m table grabs the p2m lock by default, so that the answer to the query remains true until the caller can act on that information; it is up to the caller then to release the lock. Unfortunately, certain failure paths don't release the...