CVE-2016-4020 | BDVDB-2026-76160 Detail
Description#
The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).
Impact#
No impact statement in the source data.
Weaknesses#
No weakness recorded in the source data.
References#
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=691a02e2ce0c413236a78dee6f2651c937b09fb0
- https://bugzilla.redhat.com/show_bug.cgi?id=1313686
- https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01106.html
- http://www.securityfocus.com/bid/86067
- https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01118.html
- https://access.redhat.com/errata/RHSA-2017:2392
- https://security.gentoo.org/glsa/201609-01
- http://www.ubuntu.com/usn/USN-2974-1
- https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
- https://access.redhat.com/errata/RHSA-2017:2408
- https://access.redhat.com/errata/RHSA-2017:1856
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.