Описание
x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, Xen's safety logic doesn't account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. In such cases, Xen's safety logic can incorrectly conclude that the contents of a page is safe.
Ссылки
- ExploitThird Party AdvisoryVDB Entry
- Mailing ListThird Party Advisory
- PatchVendor Advisory
- Third Party Advisory
- Third Party Advisory
- Vendor Advisory
- ExploitThird Party AdvisoryVDB Entry
- Mailing ListThird Party Advisory
- PatchVendor Advisory
- Third Party Advisory
- Third Party Advisory
- Vendor Advisory
Уязвимые конфигурации
Одно из
EPSS
6.7 Medium
CVSS3
7.2 High
CVSS2
Дефекты
Связанные уязвимости
x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, Xen's safety logic doesn't account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. In such cases, Xen's safety logic can incorrectly conclude that the contents of a page is safe.
x86 pv: Insufficient care with non-coherent mappings T[his CNA informa ...
x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, Xen's safety logic doesn't account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. In such cases, Xen's safety logic can incorrectly conclude that the contents of a page is safe.
Уязвимость гипервизора Xen, связанная с выходом операции за границы буфера в памяти, позволяющая нарушителю выполнить произвольный код
EPSS
6.7 Medium
CVSS3
7.2 High
CVSS2