CVE-2026-31601

Kernel crash via uninitialized VF reset state

Published Apr 24, 2026 · Updated Apr 24, 2026

Denial of service in Linux kernel vfio/xe 6.19 through 6.19.13 and 7.0 allows local users to crash the kernel through a VF reset. Reset handling calls xe_sriov_vfio_wait_flr_done with xe_vfio_pci_core_device members left uninitialized because their setup occurs only during migration initialization. The path requires an Intel Xe SR-IOV VF without migration support and local privilege to write its reset sysfs attribute; the bounded impact is a kernel Oops and service interruption.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux kernel vfio/xe 6.19 through 6.19.13 and 7.0 allows local users to crash the kernel through a VF reset. Reset handling calls xe_sriov_vfio_wait_flr_done with xe_vfio_pci_core_device members left uninitialized because their setup occurs only during migration initialization. The path requires an Intel Xe SR-IOV VF without migration support and local privilege to write its reset sysfs attribute; the bounded impact is a kernel Oops and service interruption.

The record

CVE
CVE-2026-31601
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <73e53ff144a538f1843b3dea1e2740a755031cdc
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8fa4113fc65b8b29a30fbbca5fd82221dc6e146e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <73e53ff144a538f1843b3dea1e2740a755031cdc; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8fa4113fc65b8b29a30fbbca5fd82221dc6e146e

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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