CVE-2016-7421: n/a vulnerability

CVE-2016-7421: The pvscsi_ring_pop_req_descr function in hw/scsi/vmw_pvscsi.c in QEMU (aka Quick Emulator) allows local gu...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 01:57 UTC (UTC+00:00)

Security readout for executives and security teams

A guest administrator could make a QEMU virtual machine process hang or crash through the VMware paravirtual SCSI device path. The likely business impact is outage of affected virtual machines, not direct host takeover based on the supplied sources. Exposure is most likely on virtualization hosts running QEMU with the pvscsi device available to guests. The supplied data does not identify exact affected versions or package ranges, so distribution advisories must be used for asset mapping. Treat as a virtualization availability issue. Prioritize shared or multi-tenant QEMU environments first, especially where guest administrators are not fully trusted. Mitigation focus: Update QEMU through vendor or distribution packages that include the pvscsi loop limit fix.; Review QEMU, Gentoo, and Debian advisories for affected package mapping.; Restrict administrative access inside guest systems where QEMU pvscsi is exposed..

Prepared: Jun 13, 2026, 13:16 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Dec 10, 2016, 00:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
[qemu-devel] 20160915 [PULL 07/17] scsi: pvscsi: limit process IO loop to ring sizeCVE reference · mailing-list, x_refsource_MLIST
GLSA-201609-01CVE reference · vendor-advisory, x_refsource_GENTOO
[debian-lts-announce] 20181130 [SECURITY] [DLA 1599-1] qemu security updateCVE reference · mailing-list, x_refsource_MLIST

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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