kernel: security and bugfix update (important)

The Linux kernel was updated to fix various bugs and security issues: - mm/page-writeback.c: do not count anon pages as dirtyable memory reclaim stalls. - mm/page-writeback.c: fix dirtybalancereserve subtraction from dirtyable memory reclaim stalls. - compatsysrecvmmsg X32 fix bnc860993...

Fedora 20 : xen-4.3.1-6.fc20 (2013-23251)

Disaggregated domain management security status update, IOMMU TLB flushing may be inadvertently suppressed Lock order reversal between pagealloclock and mmrwlock, Hypercalls exposed to privilege rings 1 and 2 of HVM guests Insufficient TLB flushing in VT-d iommu code Note that Tenable Network...

SuSE 11.3 Security Update : Xen (SAT Patch Number 8588)

The Xen hypervisor and tool-suite have been updated to fix security issues and bugs : - XSA-73: A lock order reversal between page allocation and grant table locks could lead to host crashes or even host code execution. CVE-2013-4494 - XSA-74: A lock order reversal between pagealloclock and...

CVE-2013-6400

Xen 4.2.x and 4.3.x, when using Intel VT-d and a PCI device has been assigned, does not clear the flag that suppresses IOMMU TLB flushes when unspecified errors occur, which causes the TLB entries to not be flushed and allows local guest administrators to cause a denial of service host crash or...

CVE-2013-6400

Xen 4.2.x and 4.3.x, when using Intel VT-d and a PCI device has been assigned, does not clear the flag that suppresses IOMMU TLB flushes when unspecified errors occur, which causes the TLB entries to not be flushed and allows local guest administrators to cause a denial of service host crash or...

Code injection

Xen 4.2.x and 4.3.x, when using Intel VT-d and a PCI device has been assigned, does not clear the flag that suppresses IOMMU TLB flushes when unspecified errors occur, which causes the TLB entries to not be flushed and allows local guest administrators to cause a denial of service host crash or...

CVE-2013-6400

Xen 4.2.x and 4.3.x, when using Intel VT-d and a PCI device has been assigned, does not clear the flag that suppresses IOMMU TLB flushes when unspecified errors occur, which causes the TLB entries to not be flushed and allows local guest administrators to cause a denial of service host crash or...

CVE-2013-6400

Xen 4.2.x and 4.3.x, when using Intel VT-d and a PCI device has been assigned, does not clear the flag that suppresses IOMMU TLB flushes when unspecified errors occur, which causes the TLB entries to not be flushed and allows local guest administrators to cause a denial of service host crash or...

CVE-2013-6400

CVE-2013-6400 affects Xen 4.2.x and 4.3.x when Intel VT-d is used and a PCI device is assigned. The root cause is failure to clear a flag that suppresses IOMMU TLB flushes on unspecified errors, causing TLB entries to not be flushed. This can allow a local guest administrator to crash the host or...

CVE-2013-6400

Xen 4.2.x and 4.3.x, when using Intel VT-d and a PCI device has been assigned, does not clear the flag that suppresses IOMMU TLB flushes when unspecified errors occur, which causes the TLB entries to not be flushed and allows local guest administrators to cause a denial of service host crash or...

IOMMU TLB flushing may be inadvertently suppressed

ISSUE DESCRIPTION An internal flag is used to temporarily suppress IOMMU TLB flushes, in order to consolidate multiple single page flushes into one wider flush. This flag is not cleared again, on certain error paths. This can result in TLB flushes not happening when they are needed. Retaining sta...

Fedora 19 : xen-4.2.3-10.fc19 (2013-22325)

Lock order reversal between pagealloclock and mmrwlock, Hypercalls exposed to privilege rings 1 and 2 of HVM guests, Insufficient TLB flushing in VT-d iommu code Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable ha...

CVE-2013-6375

Xen 4.2.x and 4.3.x, when using Intel VT-d for PCI passthrough, does not properly flush the TLB after clearing a present translation table entry, which allows local guest administrators to cause a denial of service or gain privileges via unspecified vectors related to an "inverted boolean...

Code injection

Xen 4.2.x and 4.3.x, when using Intel VT-d for PCI passthrough, does not properly flush the TLB after clearing a present translation table entry, which allows local guest administrators to cause a denial of service or gain privileges via unspecified vectors related to an "inverted boolean...

CVE-2013-6375

Xen 4.2.x and 4.3.x, when using Intel VT-d for PCI passthrough, does not properly flush the TLB after clearing a present translation table entry, which allows local guest administrators to cause a denial of service or gain privileges via unspecified vectors related to an "inverted boolean...

CVE-2013-6375

CVE-2013-6375 is referenced in OracleVM OVMSA-2016-0008 as part of a set of Xen-related fixes. The advisory documents a VT-d TLB flushing issue in the dma_pte_clear_one path that could affect Xen when PCI passthrough is used, potentially enabling a privileged local guest attacker to cause a denia...

CVE-2013-6375

Xen 4.2.x and 4.3.x, when using Intel VT-d for PCI passthrough, does not properly flush the TLB after clearing a present translation table entry, which allows local guest administrators to cause a denial of service or gain privileges via unspecified vectors related to an "inverted boolean...

CVE-2013-6375

Xen 4.2.x and 4.3.x, when using Intel VT-d for PCI passthrough, does not properly flush the TLB after clearing a present translation table entry, which allows local guest administrators to cause a denial of service or gain privileges via unspecified vectors related to an "inverted boolean...

SuSE 11.3 Security Update : Linux kernel (SAT Patch Numbers 8524 / 8525 / 8528)

The SUSE Linux Enterprise 11 Service Pack 3 kernel was updated to version 3.0.101 and also includes various other bug and security fixes. The following features have been added : - Drivers: hv: Support handling multiple VMBUS versions FATE314665. - Drivers: hv: Save and export negotiated vmbus...

Insufficient TLB flushing in VT-d (iommu) code

ISSUE DESCRIPTION An inverted boolean parameter resulted in TLB flushes not happening upon clearing of a present translation table entry. Retaining stale TLB entries could allow guests access to memory that ought to have been revoked, or grant greater access than intended. IMPACT Malicious guest...