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CVE-2019-19581

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 202003-56
Posted Mar 26, 2020
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202003-56 - Multiple vulnerabilities have been found in Xen, the worst of which could allow for privilege escalation. Versions less than 4.12.0-r1 are affected.

tags | advisory, vulnerability
systems | linux, gentoo
advisories | CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2018-12207, CVE-2019-11091, CVE-2019-11135, CVE-2019-18420, CVE-2019-18421, CVE-2019-18423, CVE-2019-18424, CVE-2019-18425, CVE-2019-19577, CVE-2019-19578, CVE-2019-19580, CVE-2019-19581, CVE-2019-19582, CVE-2019-19583
SHA-256 | 7959dee17cd4227918a51fda5daa8418f726f545d628a763b80ddbb67566d1eb
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