Bug 1958955 (CVE-2021-3545) - CVE-2021-3545 QEMU: vhost-user-gpu: information disclosure due to uninitialized memory read
Summary: CVE-2021-3545 QEMU: vhost-user-gpu: information disclosure due to uninitializ...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2021-3545
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1959053 1959060
Blocks: 1957311 1959063
TreeView+ depends on / blocked
 
Reported: 2021-05-10 13:27 UTC by Mauro Matteo Cascella
Modified: 2022-02-01 09:36 UTC (History)
26 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit this issue to leak memory from the host.
Clone Of:
Environment:
Last Closed: 2021-10-29 09:03:21 UTC
Embargoed:

Attachments (Terms of Use)

Description Mauro Matteo Cascella 2021-05-10 13:27:05 UTC 
An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit this issue to leak memory from the host.

Patch series:
https://lists.nongnu.org/archive/html/qemu-devel/2021-05/msg04536.html

Memory disclosure in virgl_cmd_get_capset_info() in virgl.c:
https://lists.nongnu.org/archive/html/qemu-devel/2021-05/msg04539.html
Comment 2 Mauro Matteo Cascella 2021-05-10 16:09:56 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1959053]
Comment 4 Mauro Matteo Cascella 2021-05-12 17:41:56 UTC 
Statement:

This issue does not affect the versions of `qemu-kvm` as shipped with Red Hat Enterprise Linux 6, 7 and 8, as Virgl was not enabled in these versions. Support for Virgl was enabled as technical preview in Red Hat Enterprise Linux Advanced Virtualization 8.2, and later disabled in Red Hat Enterprise Linux Advanced Virtualization 8.3.
Comment 6 Mauro Matteo Cascella 2021-05-31 10:48:42 UTC 
Upstream commit:
https://gitlab.com/qemu-project/qemu/-/commit/121841b2
Note You need to log in before you can comment on or make changes to this bug.