CVE-2026-43473

System crash via unchecked queue pointers

Published May 8, 2026 · Updated May 8, 2026

NULL pointer dereference in the Linux Kernel mpi3mr SCSI driver allows local users to crash the system during queue cleanup. When request or reply queue creation fails, cleanup frees the queue memory and then calls memset on the resulting NULL pointer without checking it. Exploitation requires local low-privileged access and the affected driver to encounter a queue-creation failure.

CVSS severity5.5
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux Kernel mpi3mr SCSI driver allows local users to crash the system during queue cleanup. When request or reply queue creation fails, cleanup frees the queue memory and then calls memset on the resulting NULL pointer without checking it. Exploitation requires local low-privileged access and the affected driver to encounter a queue-creation failure.

The record

CVE
CVE-2026-43473
Published
May 8, 2026
Updated
May 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 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 <220d7ca70611a73d50ef8e9edac630ed1ececb7c
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <78d3f201f8b609928eade53cf03a52df5415aaf7
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7da755e0d02e9ca035065127e108d1fed8950dc8
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7df0296ad4e9253d12c6dbe7f120044dddc95600
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e978a36f332ede78eb4de037b517db16265d420d
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f8e833572a3e12a2a1ffe7b3646af024264d38ca
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fa96392ebebc8fade2b878acb14cce0f71016503

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <220d7ca70611a73d50ef8e9edac630ed1ececb7c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <78d3f201f8b609928eade53cf03a52df5415aaf7; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7da755e0d02e9ca035065127e108d1fed8950dc8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7df0296ad4e9253d12c6dbe7f120044dddc95600; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e978a36f332ede78eb4de037b517db16265d420d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f8e833572a3e12a2a1ffe7b3646af024264d38ca; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fa96392ebebc8fade2b878acb14cce0f71016503

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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference

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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