Date: Tue, 20 Nov 2018 16:51:28 +0530 (IST) From: P J P <ppandit@...hat.com> To: oss security list <oss-security@...ts.openwall.com> cc: Greg Kurz <groug@...d.org>, zhibin hu <noirfate@...il.com> Subject: CVE-2018-19364 Qemu: 9pfs: Use-after-free due to race condition while updating fid path Hello, A use-after-free flaw was found in the VirtFS, host directory sharing via Plan 9 File System(9pfs) support in QEMU. It could occur due to a race condition in updating fid path in worker threads via v9fs_path_copy(), while accessing files on a shared host directory. A user inside guest could use this flaw to crash the QEMU process resulting in DoS issue. Upstream patch: --------------- -> https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg01139.html -> https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg02795.html This issue was reported by Zhibin hu. Thank you. -- Prasad J Pandit / Red Hat Product Security Team 47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F
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