CVE-2019-19580

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations, because of an incomplete fix for CVE-2019-18421. XSA-299 addressed several critical issues in restartable PV type...

CVE-2019-19578

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to cause a denial of service via degenerate chains of linear pagetables, because of an incorrect fix for CVE-2017-15595. "Linear pagetables" is a technique which involves either pointing a pagetable at itself, or to...

CVE-2019-19580

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations, because of an incomplete fix for CVE-2019-18421. XSA-299 addressed several critical issues in restartable PV type...

Race condition

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations, because of an incomplete fix for CVE-2019-18421. XSA-299 addressed several critical issues in restartable PV type...

UBUNTU-CVE-2019-19580

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations, because of an incomplete fix for CVE-2019-18421. XSA-299 addressed several critical issues in restartable PV type...

UBUNTU-CVE-2019-19583

An issue was discovered in Xen through 4.12.x allowing x86 HVM/PVH guest OS users to cause a denial of service guest OS crash because VMX VMEntry checks mishandle a certain case. Please see XSA-260 for background on the MovSS shadow. Please see XSA-156 for background on the need for DB...

UBUNTU-CVE-2019-19578

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to cause a denial of service via degenerate chains of linear pagetables, because of an incorrect fix for CVE-2017-15595. "Linear pagetables" is a technique which involves either pointing a pagetable at itself, or to...

CVE-2019-19578

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to cause a denial of service via degenerate chains of linear pagetables, because of an incorrect fix for CVE-2017-15595. "Linear pagetables" is a technique which involves either pointing a pagetable at itself, or to...

CVE-2019-19578

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to cause a denial of service via degenerate chains of linear pagetables, because of an incorrect fix for CVE-2017-15595. "Linear pagetables" is a technique which involves either pointing a pagetable at itself, or to...

CVE-2019-19580

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations, because of an incomplete fix for CVE-2019-18421. XSA-299 addressed several critical issues in restartable PV type...

CVE-2019-19580

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations, because of an incomplete fix for CVE-2019-18421. XSA-299 addressed several critical issues in restartable PV type...

CVE-2019-19580

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations, because of an incomplete fix for CVE-2019-18421. XSA-299 addressed several critical issues in restartable PV type...

Linear pagetable use / entry miscounts

ISSUE DESCRIPTION "Linear pagetables" is a technique which involves either pointing a pagetable at itself, or to another pagetable of the same or higher level. Xen has limited support for linear pagetables: A page may either point to itself, or point to another pagetable of the same level i.e., L...

Further issues with restartable PV type change operations

ISSUE DESCRIPTION XSA-299 addressed several critical issues in restartable PV type change operations. Despite extensive testing and auditing, some corner cases were missed. IMPACT A malicious PV guest administrator may be able to escalate their privilege to that of the host. VULNERABLE SYSTEMS Al...

Fedora 30 : xen (2019-cbb732f760)

add missing XSA-299 patches x86: Machine Check Error on Page Size Change DoS XSA-304, CVE-2018-12207 TSX Asynchronous Abort speculative side channel XSA-305, CVE-2019-11135 ---- VCPUOPinitialise DoS XSA-296, CVE-2019-18420 missing descriptor table limit checking in x86 PV emulation XSA-298,...

Fedora 29 : xen (2019-865bb16900)

VCPUOPinitialise DoS XSA-296, CVE-2019-18420 missing descriptor table limit checking in x86 PV emulation XSA-298, CVE-2019-18425 Issues with restartable PV type change operations XSA-299, CVE-2019-18421 1767726 add-to-physmap can be abused to DoS Arm hosts XSA-301, CVE-2019-18423 passed through P...

openSUSE Security Update : xen (openSUSE-2019-2508)

This update for xen fixes the following issues : - CVE-2018-12207: Untrusted virtual machines on Intel CPUs could exploit a race condition in the Instruction Fetch Unit of the Intel CPU to cause a Machine Exception during Page Size Change, causing the CPU core to be non-functional. bsc1155945 -...

Security update for qemu (important)

openSUSE Security Update: Security update for qemu Announcement ID: openSUSE-SU-2019:2510-1 Rating: important References: 1079730 1098403 1111025 1117665 1119991 1143794 1144087 1145379 1145427 1145436 1145774 1146873 1149811 1152506 Cross-References: CVE-2018-12207 CVE-2018-20126 CVE-2019-11135...

SUSE SLED15 / SLES15 Security Update : qemu (SUSE-SU-2019:2955-1)

This update for qemu fixes the following issues : qemu was updated to v3.1.1.1, a stable, bug-fix-only release, which includes 2 fixes we already carry, as well as one additional use- after-free fix in slirp. CVE-2018-20126 bsc1119991, CVE-2019-14378 bsc1143794, and CVE-2019-15890 bsc1149811...

SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2019:2961-1)

This update for xen fixes the following issues : CVE-2018-12207: Untrusted virtual machines on Intel CPUs could exploit a race condition in the Instruction Fetch Unit of the Intel CPU to cause a Machine Exception during Page Size Change, causing the CPU core to be non-functional. bsc1155945...