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Gentoo Linux: CVE-2021-28691: Xen: Multiple vulnerabilities

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Gentoo Linux: CVE-2021-28691: Xen: Multiple vulnerabilities

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
06/29/2021
Created
07/14/2021
Added
07/13/2021
Modified
07/13/2021

Description

Guest triggered use-after-free in Linux xen-netback A malicious or buggy network PV frontend can force Linux netback to disable the interface and terminate the receive kernel thread associated with queue 0 in response to the frontend sending a malformed packet. Such kernel thread termination will lead to a use-after-free in Linux netback when the backend is destroyed, as the kernel thread associated with queue 0 will have already exited and thus the call to kthread_stop will be performed against a stale pointer.

Solution(s)

  • gentoo-linux-upgrade-app-emulation-xen

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