CVE-2016-7421

low-risk
Published 2016-12-10

The pvscsi_ring_pop_req_descr function in hw/scsi/vmw_pvscsi.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by leveraging failure to limit process IO loop to the ring size.

Do I need to act?

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0.11% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.4/10 Medium
LOCAL / LOW complexity

Affected Products (2)

Affected Vendors

Debian Qemu

References (14)

http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=d251157ac1928191af851d199a9ff255d...
Mailing List http://www.openwall.com/lists/oss-security/2016/09/16/3
Mailing List http://www.openwall.com/lists/oss-security/2016/09/16/9
Third Party Advisory http://www.securityfocus.com/bid/92998
Mailing List https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
Patch https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03609.html
Third Party Advisory https://security.gentoo.org/glsa/201609-01
http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=d251157ac1928191af851d199a9ff255d...
Mailing List http://www.openwall.com/lists/oss-security/2016/09/16/3
Mailing List http://www.openwall.com/lists/oss-security/2016/09/16/9
Third Party Advisory http://www.securityfocus.com/bid/92998
Mailing List https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
Patch https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03609.html
Third Party Advisory https://security.gentoo.org/glsa/201609-01
22
/ 100
low-risk
Severity 15/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low