An issue exists in Xen up to and including 4.14.x. There are evtchn_reset() race conditions. Uses of EVTCHNOP_reset (potentially by a guest on itself) or XEN_DOMCTL_soft_reset (by itself covered by XSA-77) can lead to the violation of various internal assumptions. This may lead to out of bounds memory accesses or triggering of bug checks. In particular, x86 PV guests may be able to elevate their privilege to that of the host. Host and guest crashes are also possible, leading to a Denial of Service (DoS). Information leaks cannot be ruled out. All Xen versions from 4.5 onwards are vulnerable. Xen versions 4.4 and previous versions are not vulnerable.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
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xen xen |
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fedoraproject fedora 31 |
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fedoraproject fedora 32 |
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fedoraproject fedora 33 |
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opensuse leap 15.2 |
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debian debian linux 10.0 |
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