Out-of-bounds Read Affecting xen package, versions <4.9.0-r4


0.0
high

Snyk CVSS

    Attack Complexity Low
    Scope Changed
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.06% (25th percentile)
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NVD
8.8 high

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  • Snyk ID SNYK-ALPINE315-XEN-1929348
  • published 21 Jul 2020
  • disclosed 12 Sep 2017

How to fix?

Upgrade Alpine:3.15 xen to version 4.9.0-r4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Alpine. See How to fix? for Alpine:3.15 relevant fixed versions and status.

A parameter verification issue was discovered in Xen through 4.9.x. The function alloc_heap_pages allows callers to specify the first NUMA node that should be used for allocations through the memflags parameter; the node is extracted using the MEMF_get_node macro. While the function checks to see if the special constant NUMA_NO_NODE is specified, it otherwise does not handle the case where node &gt;= MAX_NUMNODES. This allows an out-of-bounds access to an internal array.