Date: Mon, 1 Jun 2020 17:54:06 +0530 (IST) From: P J P <ppandit@...hat.com> To: oss security list <oss-security@...ts.openwall.com> cc: Alexander Bulekov <alxndr@...edu> Subject: CVE-2020-13659 QEMU: exec: address_space_map returns NULL without setting length to zero may lead to DoS Hello, A NULL pointer dereference issue was found in the MegaRAID SAS 8708EM2 emulator of the QEMU. This issue occurs because the address_space_map() API while mapping physical memory into host's virtual address space may return NULL, without setting the length parameter to zero(0). A guest user/process may use this flaw to crash the QEMU process on the host resulting in DoS scenario. Upstream patch: --------------- -> https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg07313.html Reference: ---------- -> https://bugs.launchpad.net/qemu/+bug/1878259 Thank you. -- Prasad J Pandit / Red Hat Product Security Team 8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D
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