CVE-2023-46835

The current setup of the quarantine page tables assumes that the quarantine domain domio has been initialized with an address width of DEFAULTDOMAINADDRESSWIDTH 48 and hence 4 page table levels. However domio being a PV domain gets the AMD-Vi IOMMU page tables levels based on the maximum hot...

ALPINE-CVE-2023-46835

The current setup of the quarantine page tables assumes that the quarantine domain domio has been initialized with an address width of DEFAULTDOMAINADDRESSWIDTH 48 and hence 4 page table levels. However domio being a PV domain gets the AMD-Vi IOMMU page tables levels based on the maximum hot...

CVE-2023-46835

The current setup of the quarantine page tables assumes that the quarantine domain domio has been initialized with an address width of DEFAULTDOMAINADDRESSWIDTH 48 and hence 4 page table levels. However domio being a PV domain gets the AMD-Vi IOMMU page tables levels based on the maximum hot...

ALPINE-CVE-2023-34322

For migration as well as to work around kernels unaware of L1TF see XSA-273, PV guests may be run in shadow paging mode. Since Xen itself needs to be mapped when PV guests run, Xen and shadowed PV guests run directly the respective shadow page tables. For 64-bit PV guests this means running on th...

DEBIAN-CVE-2023-34322

For migration as well as to work around kernels unaware of L1TF see XSA-273, PV guests may be run in shadow paging mode. Since Xen itself needs to be mapped when PV guests run, Xen and shadowed PV guests run directly the respective shadow page tables. For 64-bit PV guests this means running on th...

Code injection

The current setup of the quarantine page tables assumes that the quarantine domain domio has been initialized with an address width of DEFAULTDOMAINADDRESSWIDTH 48 and hence 4 page table levels. However domio being a PV domain gets the AMD-Vi IOMMU page tables levels based on the maximum hot...

UBUNTU-CVE-2023-46835

The current setup of the quarantine page tables assumes that the quarantine domain domio has been initialized with an address width of DEFAULTDOMAINADDRESSWIDTH 48 and hence 4 page table levels. However domio being a PV domain gets the AMD-Vi IOMMU page tables levels based on the maximum hot...

CVE-2023-46835 x86/AMD: mismatch in IOMMU quarantine page table levels

The current setup of the quarantine page tables assumes that the quarantine domain domio has been initialized with an address width of DEFAULTDOMAINADDRESSWIDTH 48 and hence 4 page table levels. However domio being a PV domain gets the AMD-Vi IOMMU page tables levels based on the maximum hot...

CVE-2023-46835 x86/AMD: mismatch in IOMMU quarantine page table levels

The current setup of the quarantine page tables assumes that the quarantine domain domio has been initialized with an address width of DEFAULTDOMAINADDRESSWIDTH 48 and hence 4 page table levels. However domio being a PV domain gets the AMD-Vi IOMMU page tables levels based on the maximum hot...

SUSE-SU-2023:4945-1 Security update for xen

This update for xen fixes the following issues: - CVE-2023-46836: Fixed BTC/SRSO fixes not fully effective bsc1216807. - CVE-2023-46835: Fixed mismatch in IOMMU quarantine page table levels on x86/AMD bsc1216654. Update to Xen 4.17.3 bug fix release bsc1027519...

Information Leak

Xen Citrix Hypervisor is vulnerable to Information Leak. The vulnerability is caused due to a quarantine page table level mismatch of the quarantine domain domio where last page table directory PDE effectively becoming a page table entry PTE causing a device in quarantine mode gaining write acces...

Xen: x86/AMD: Mismatch in IOMMU Quarantine Page Table Levels (XSA-445)

The current setup of quarantine page tables assumes that there are 4 page table levels, however the AMD-Vi IOMMU is configured with 3 page table levels for systems without RAM above the 512 GB boundary. Due to this level mismatch, the sink page the device gets read/write access to is no longer...

Xen Security Vulnerabilities

Xen is an open source virtual machine monitor product from the University of Cambridge, UK. The product enables different and incompatible operating systems to run on the same computer and supports runtime migration to ensure uptime and avoid downtime. Xen has a security vulnerability that stems...

kernel: drm/amdgpu: SDMA update use unlocked iterator

A denial of service exists in the linux kernel such that there is a SDMA update page table may be called from an unlocked context, leading to damage to system availability and integrity...

PT-2023-7266 · Xen +2 · Xen +2

Name of the Vulnerable Software and Affected Versions: Xen affected versions not specified Description: The issue arises from a mismatch in the IOMMU quarantine page table levels. On systems with no RAM above the 512GB mark, only 3 page-table levels are configured in the IOMMU, while the quaranti...

kernel: KVM: s390: pv: fix index value of replaced ASCE

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pv: fix index value of replaced ASCE The index field of the struct page corresponding to a guest ASCE should be 0. When replacing the ASCE in s390replaceasce, the index of the new ASCE should also be set to 0. Having t...

kernel: mm/hugetlb: fix PTE marker handling in hugetlb_change_protection()

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix PTE marker handling in hugetlbchangeprotection Patch series "mm/hugetlb: uffd-wp fixes for hugetlbchangeprotection". Playing with virtio-mem and background snapshots using uffd-wp on hugetlb in QEMU, I managed to...

kernel: iommufd: Do not add the same hwpt to the ioas->hwpt_list twice

A linked list corruption flaw was found in the Linux kernel's iommufd subsystem. During HWPT Hardware Page Table specific attachment, the same hwpt can be added to the ioas-hwptlist twice due to leftover code from a previous rework. This duplicate insertion corrupts the linked list structure,...

kernel: mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths

A flaw was found in the Linux kernel. The memory management unit MMU notifiers were not properly invoked when page table entries were removed during certain memory collapse operations. This oversight could lead to a use-after-free vulnerability, where the system attempts to access deallocated...

kernel security and bug fix update

3.10.0-1160.95.1.0.1.OL7 - debug: lock down kgdb Orabug: 34270798 CVE-2022-21499 3.10.0-1160.95.1.OL7 - Update Oracle Linux certificates Ilya Okomin - Oracle Linux RHCK Module Signing Key was compiled into kernel [email protected] - Update x509.genkey Orabug: 2481767...