* Re: CVE-2021-47574: xen/netfront: harden netfront against event channel storms [not found] <2024061914-CVE-2021-47574-18b4@gregkh> @ 2024-06-20 7:54 ` Juergen Gross 0 siblings, 0 replies; only message in thread From: Juergen Gross @ 2024-06-20 7:54 UTC (permalink / raw) To: cve, linux-kernel; +Cc: Greg Kroah-Hartman, security [-- Attachment #1.1.1: Type: text/plain, Size: 738 bytes --] On 19.06.24 16:54, Greg Kroah-Hartman wrote: > Description > =========== > > In the Linux kernel, the following vulnerability has been resolved: > > xen/netfront: harden netfront against event channel storms > > The Xen netfront driver is still vulnerable for an attack via excessive > number of events sent by the backend. Fix that by using lateeoi event > channels. > > For being able to detect the case of no rx responses being added while > the carrier is down a new lock is needed in order to update and test > rsp_cons and the number of seen unconsumed responses atomically. > > This is part of XSA-391 When issuing XSA-391 the Xen security team already assigned CVE-2021-28712 to this issue. Juergen [-- Attachment #1.1.2: OpenPGP public key --] [-- Type: application/pgp-keys, Size: 3743 bytes --] [-- Attachment #2: OpenPGP digital signature --] [-- Type: application/pgp-signature, Size: 495 bytes --] ^ permalink raw reply [flat|nested] only message in thread
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2024-06-20 7:54 ` CVE-2021-47574: xen/netfront: harden netfront against event channel storms Juergen Gross
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