CVE-2019-19581

CVE-2019-19581

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An issue was discovered in Xen through 4.12.x allowing 32-bit Arm guest OS users to cause a denial of service (out-of-bounds access) because certain bit iteration is mishandled. In a number of places bitmaps are being used by the hypervisor to track certain state. Iteration over all bits involves functions which may misbehave in certain corner cases: On 32-bit Arm accesses to bitmaps with bit a count which is a multiple of 32, an out of bounds access may occur. A malicious guest may cause a hypervisor crash or hang, resulting in a Denial of Service (DoS). All versions of Xen are vulnerable. 32-bit Arm systems are vulnerable. 64-bit Arm systems are not vulnerable.

CVSS 6.5 · Mittel · EPSS 0,4% · Korrektur verfügbar

Veröffentlicht

2019-12-11T16:50:48.000Z

Aktualisiert

2024-08-05T02:16:48.563Z

Technologie-Stack: system

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