CVE-2024-26328

Guest-triggered availability interruption via SR-IOV VF miscount

Published Feb 19, 2024 · Updated Nov 6, 2024

Out-of-bounds access in QEMU 7.1.0 through 8.2.1 allows guest OS users to cause an availability interruption via SR-IOV writes. nvme_sriov_pre_write_ctrl() trusts PCI_SRIOV_NUM_VF as the enabled-VF count and indexes the secondary-controller array beyond its bounds when the configured and enabled counts differ. Administrative guest access to an emulated NVMe controller with SR-IOV is required; the exact interruption mode is not publicly specified.

CVSS severity6.0
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in QEMU 7.1.0 through 8.2.1 allows guest OS users to cause an availability interruption via SR-IOV writes. nvme_sriov_pre_write_ctrl() trusts PCI_SRIOV_NUM_VF as the enabled-VF count and indexes the secondary-controller array beyond its bounds when the configured and enabled counts differ. Administrative guest access to an emulated NVMe controller with SR-IOV is required; the exact interruption mode is not publicly specified.

The record

CVE
CVE-2024-26328
Published
Feb 19, 2024
Updated
Nov 6, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Feb 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.0UbuntuCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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