UBUNTU-CVE-2020-29569

An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring-xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the...

CVE-2020-29569

An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring-xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the...

CVE-2020-29569

CVE-2020-29569 describes a use-after-free in the Linux kernel PV block backend (blkback) when Xen is used, where the kernel thread handler may not reset ring->xenblkd to NULL if the frontend toggles between connect/disconnect, allowing a misbehaving guest to trigger a dom0 crash. The issue aff...

Use after free triggered by block frontend in Linux blkback

ISSUE DESCRIPTION The Linux kernel PV block backend expects the kernel thread handler to reset ring-xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggle between the states connect and disconnect. As a consequence, the block backend may re-use ...

CVE-2020-29569: Use After Free

An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring-xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the...

CVE-2019-19869

CVE-2019-19869 affects B&R Industrial Automation APROL (before R4.2 V7.08). The issue allows PVs to be changed via the IosHttp service and JSON interface in unencrypted form, impacting data integrity. No explicit exploit details or in-wild exploitation are provided in the documents. Remediation/v...

CVE-2019-19869: Undefined Security Weakness

An issue was discovered in B&R Industrial Automation APROL before R4.2 V7.08. PVs could be changed unencrypted by using the IosHttp service and the JSON interface...

Moderate: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the...

CVE-2020-27674

An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique...

CVE-2020-27674: Out-of-bounds Write

An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique...

PT-2020-16761

Name of the Vulnerable Software and Affected Versions Xen versions through 4.14.x Description An issue allows x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents. This is because invalidation of TLB entries is mishandled during use of an INVLPG-like attack...

x86 PV guest INVLPG-like flushes may leave stale TLB entries

ISSUE DESCRIPTION x86 PV guest kernels may use hypercalls with INVLPG-like behavior to invalidate TLB entries even after changes to non-leaf page tables. Such changes to non-leaf page tables will, however, also render stale possible TLB entries created by Xen's internal use of linear page tables ...

Fedora 33 : xen (2020-306b84fd07)

x86 pv: Crash when handling guest access to MSRMISCENABLE XSA-333, CVE-2020-25602 1881619 Missing unlock in XENMEMacquireresource error path XSA-334, CVE-2020-25598 1881616 race when migrating timers between x86 HVM vCPU-s XSA-336, CVE-2020-25604 1881618 PCI passthrough code reading back hardware...

Fedora 31 : xen (2020-d46fe34349)

x86 pv: Crash when handling guest access to MSRMISCENABLE XSA-333, CVE-2020-25602 1881619 Missing unlock in XENMEMacquireresource error path XSA-334, CVE-2020-25598 1881616 race when migrating timers between x86 HVM vCPU-s XSA-336, CVE-2020-25604 1881618 PCI passthrough code reading back hardware...

CVE-2020-25602

An issue was discovered in Xen through 4.14.x. An x86 PV guest can trigger a host OS crash when handling guest access to MSRMISCENABLE. When a guest accesses certain Model Specific Registers, Xen first reads the value from hardware to use as the basis for auditing the guest access. For the...

CVE-2020-25602

An issue was discovered in Xen through 4.14.x. An x86 PV guest can trigger a host OS crash when handling guest access to MSRMISCENABLE. When a guest accesses certain Model Specific Registers, Xen first reads the value from hardware to use as the basis for auditing the guest access. For the...

CVE-2020-25596

An issue was discovered in Xen through 4.14.x. x86 PV guest kernels can experience denial of service via SYSENTER. The SYSENTER instruction leaves various state sanitization activities to software. One of Xen's sanitization paths injects a GP fault, and incorrectly delivers it twice to the guest...

CVE-2020-25596

An issue was discovered in Xen through 4.14.x. x86 PV guest kernels can experience denial of service via SYSENTER. The SYSENTER instruction leaves various state sanitization activities to software. One of Xen's sanitization paths injects a GP fault, and incorrectly delivers it twice to the guest...

CVE-2020-25602

CVE-2020-25602 : Xen up to 4.14.x contains a vulnerability where an x86 PV guest accessing the MISC_ENABLE MSR (0x1a0) triggers a host crash due to missing #GP fault handling when reading this Intel-specific MSR. The vulnerability can crash the host Xen instance, enabling a local Denial of Servic...

CVE-2020-25602

An issue was discovered in Xen through 4.14.x. An x86 PV guest can trigger a host OS crash when handling guest access to MSRMISCENABLE. When a guest accesses certain Model Specific Registers, Xen first reads the value from hardware to use as the basis for auditing the guest access. For the...