Описание
Security update for xen
This update for xen fixes the following issues:
- CVE-2022-23033: Fixed guest_physmap_remove_page not removing the p2m mappings. (XSA-393) (bsc#1194576)
- CVE-2022-23034: Fixed possible DoS by a PV guest Xen while unmapping a grant. (XSA-394) (bsc#1194581)
- CVE-2022-23035: Fixed insufficient cleanup of passed-through device IRQs. (XSA-395) (bsc#1194588)
Список пакетов
Image SLES15-SP1-CHOST-BYOS-EC2
Image SLES15-SP1-SAP-EC2-HVM
Image SLES15-SP1-SAPCAL-EC2-HVM
SUSE Enterprise Storage 6
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS
SUSE Linux Enterprise Server 15 SP1-BCL
SUSE Linux Enterprise Server 15 SP1-LTSS
SUSE Linux Enterprise Server for SAP Applications 15 SP1
Ссылки
- Link for SUSE-SU-2022:0468-1
- E-Mail link for SUSE-SU-2022:0468-1
- SUSE Security Ratings
- SUSE Bug 1194576
- SUSE Bug 1194581
- SUSE Bug 1194588
- SUSE CVE CVE-2022-23033 page
- SUSE CVE CVE-2022-23034 page
- SUSE CVE CVE-2022-23035 page
Описание
arm: guest_physmap_remove_page not removing the p2m mappings The functions to remove one or more entries from a guest p2m pagetable on Arm (p2m_remove_mapping, guest_physmap_remove_page, and p2m_set_entry with mfn set to INVALID_MFN) do not actually clear the pagetable entry if the entry doesn't have the valid bit set. It is possible to have a valid pagetable entry without the valid bit set when a guest operating system uses set/way cache maintenance instructions. For instance, a guest issuing a set/way cache maintenance instruction, then calling the XENMEM_decrease_reservation hypercall to give back memory pages to Xen, might be able to retain access to those pages even after Xen started reusing them for other purposes.
Затронутые продукты
Ссылки
- CVE-2022-23033
- SUSE Bug 1194576
Описание
A PV guest could DoS Xen while unmapping a grant To address XSA-380, reference counting was introduced for grant mappings for the case where a PV guest would have the IOMMU enabled. PV guests can request two forms of mappings. When both are in use for any individual mapping, unmapping of such a mapping can be requested in two steps. The reference count for such a mapping would then mistakenly be decremented twice. Underflow of the counters gets detected, resulting in the triggering of a hypervisor bug check.
Затронутые продукты
Ссылки
- CVE-2022-23034
- SUSE Bug 1194581
Описание
Insufficient cleanup of passed-through device IRQs The management of IRQs associated with physical devices exposed to x86 HVM guests involves an iterative operation in particular when cleaning up after the guest's use of the device. In the case where an interrupt is not quiescent yet at the time this cleanup gets invoked, the cleanup attempt may be scheduled to be retried. When multiple interrupts are involved, this scheduling of a retry may get erroneously skipped. At the same time pointers may get cleared (resulting in a de-reference of NULL) and freed (resulting in a use-after-free), while other code would continue to assume them to be valid.
Затронутые продукты
Ссылки
- CVE-2022-23035
- SUSE Bug 1194588