CVE-2016-5126: n/a vulnerability

CVE-2016-5126: Heap-based buffer overflow in the iscsi_aio_ioctl function in block/iscsi.c in QEMU allows local guest OS u...

Heap-based buffer overflow in the iscsi_aio_ioctl function in block/iscsi.c in QEMU allows local guest OS users to cause a denial of service (QEMU process crash) or possibly execute arbitrary code via a crafted iSCSI asynchronous I/O ioctl call.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 00:53 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2016-5126 is a QEMU flaw where a guest user may crash the QEMU process, and sources say arbitrary code execution may be possible. The business concern is strongest for virtualization hosts running vulnerable QEMU with guest access to the iSCSI AIO ioctl path. Exposure is likely limited to vulnerable QEMU deployments using the affected iSCSI block code path. The source bundle does not provide affected version ranges, so verify installed QEMU packages against vendor advisories. Treat as a prioritized virtualization-platform update, especially in multi-tenant or untrusted guest environments. The lack of KEV evidence reduces emergency pressure, but possible code execution in QEMU warrants timely remediation. Mitigation focus: Apply vendor QEMU security updates for CVE-2016-5126.; Review Red Hat, Ubuntu, Gentoo, Oracle, or Debian guidance for affected packages.; Prioritize hosts running untrusted guests or iSCSI-backed virtual disks..

Prepared: Jun 13, 2026, 14:22 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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Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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CVE-2016-5126 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jun 1, 2016, 22:00 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

5Source 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
GLSA-201609-01CVE reference · vendor-advisory, x_refsource_GENTOO
[qemu-block] 20160524 [Qemu-block] [PATCH] block/iscsi: avoid potential overflow of acb->task->cdbCVE reference · mailing-list, x_refsource_MLIST
https://bugzilla.redhat.com/show_bug.cgi?id=1340924CVE reference · x_refsource_CONFIRM
[debian-lts-announce] 20190920 [SECURITY] [DLA 1927-1] 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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