CVE-2025-40157

Kernel call trace via invalid DIMMMTR shift

Published Nov 12, 2025 · Updated May 11, 2026

Shift-out-of-bounds in the EDAC i10nm driver in affected Linux kernels produces a kernel call trace during driver loading. skx_get_dimm_info() derives a negative shift exponent after DIMM enumeration reads the invalid value ~0 from a BIOS-disabled memory controller. The condition requires i10nm_edac initialization on certain Intel Granite Rapids servers with an unpopulated, disabled controller; the published consequence is limited to the reported diagnostic call trace.

CVSS severity7.0
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Shift-out-of-bounds in the EDAC i10nm driver in affected Linux kernels produces a kernel call trace during driver loading. skx_get_dimm_info() derives a negative shift exponent after DIMM enumeration reads the invalid value ~0 from a BIOS-disabled memory controller. The condition requires i10nm_edac initialization on certain Intel Granite Rapids servers with an unpopulated, disabled controller; the published consequence is limited to the reported diagnostic call trace.

The record

CVE
CVE-2025-40157
Published
Nov 12, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Nov 12, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.3
  2. Affected versionversion=ba987eaaabf99b462cdfed86274e3455d5126349 <1652f14cf3bef5a4baa232de954fc22bdcaa78fe
  3. Affected versionversion=ba987eaaabf99b462cdfed86274e3455d5126349 <2e6fe1bbefd9c059c3787d1c620fe67343a94dff
  4. Affected versionversion=ba987eaaabf99b462cdfed86274e3455d5126349 <8100b6c0f9089d5b156642b81270ce27fff17490
  5. Affected versionversion=ba987eaaabf99b462cdfed86274e3455d5126349 <c20da24272f1ac79e9f9083bba577d049cd02bbb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.3; version=ba987eaaabf99b462cdfed86274e3455d5126349 <1652f14cf3bef5a4baa232de954fc22bdcaa78fe; version=ba987eaaabf99b462cdfed86274e3455d5126349 <2e6fe1bbefd9c059c3787d1c620fe67343a94dff; version=ba987eaaabf99b462cdfed86274e3455d5126349 <8100b6c0f9089d5b156642b81270ce27fff17490; version=ba987eaaabf99b462cdfed86274e3455d5126349 <c20da24272f1ac79e9f9083bba577d049cd02bbb

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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
PrivilegesUnavailable
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

See the directory against your own environment.

Your stack

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