CVE-2026-31783

Kernel crash via stale ECC engine registration

Published May 1, 2026 · Updated May 1, 2026

Improper cleanup in the Amlogic SPI flash controller driver in Linux kernel 6.18 allows attackers to crash the kernel locally. aml_sfc_probe() registers an on-host NAND ECC engine without teardown on probe-unwind or device-removal paths, leaving stale driver state registered. Reaching the removal path requires CAP_SYS_ADMIN in the initial user namespace to unbind the platform device, so unprivileged user namespaces cannot trigger it.

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

Improper cleanup in the Amlogic SPI flash controller driver in Linux kernel 6.18 allows attackers to crash the kernel locally. aml_sfc_probe() registers an on-host NAND ECC engine without teardown on probe-unwind or device-removal paths, leaving stale driver state registered. Reaching the removal path requires CAP_SYS_ADMIN in the initial user namespace to unbind the platform device, so unprivileged user namespaces cannot trigger it.

The record

CVE
CVE-2026-31783
Published
May 1, 2026
Updated
May 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 1, 2026CVE publishedPublication date reported by the CVE source.
  2. May 1, 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=4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9 <5e11741aec3b242a197250b473c37b58f53a16b6
  2. Affected versionversion=4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9 <b0dc7e7c56573e7a52080f25f3179a45f3dd7e6f
  3. Affected versionversion=4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9 <ee4c064e37d4d0ddc5a7580933dbe79a2c6acafc
  4. Affected versionversion=6.18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9 <5e11741aec3b242a197250b473c37b58f53a16b6; version=4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9 <b0dc7e7c56573e7a52080f25f3179a45f3dd7e6f; version=4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9 <ee4c064e37d4d0ddc5a7580933dbe79a2c6acafc; version=6.18

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
Privilegesadmin
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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