CVE-2025-40157: EDAC/i10nm: Skip DIMM enumeration on a disabled memory controller

Published Nov 12, 2025
·
Updated

In the Linux kernel, the following vulnerability has been resolved:

EDAC/i10nm: Skip DIMM enumeration on a disabled memory controller

When loading the i10nmedac driver on some Intel Granite Rapids servers, a call trace may appear as follows:

UBSAN: shift-out-of-bounds in drivers/edac/skxcommon.c:453:16 shift exponent -66 is negative ... ubsanhandleshiftoutofbounds+0x1e3/0x390 skxgetdimminfo.cold+0x47/0xd40 [skxedaccommon] i10nmgetdimmconfig+0x23e/0x390 [i10nmedac] skxregistermci+0x159/0x220 [skxedaccommon] i10nminit+0xcb0/0x1ff0 [i10nmedac] ...

This occurs because some BIOS may disable a memory controller if there aren't any memory DIMMs populated on this memory controller. The DIMMMTR register of this disabled memory controller contains the invalid value ~0, resulting in the call trace above.

Fix this call trace by skipping DIMM enumeration on a disabled memory controller.

Affected Software

131 affected componentsFixes available
Linux Linux kernel
ubuntu/linux-hwe-edge*
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-azure*
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-5.3*
ubuntu/linux-gke-4.15*
ubuntu/linux-gke-5.4*
ubuntu/linux-gkeop-5.4*
ubuntu/linux-hwe*
ubuntu/linux-hwe-edge*
ubuntu/linux-oem*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-aws-5.11*
ubuntu/linux-aws-5.13*
ubuntu/linux-aws-5.8*
ubuntu/linux-azure-5.11*
ubuntu/linux-azure-5.13*
ubuntu/linux-azure-5.8*
ubuntu/linux-azure-fde*
ubuntu/linux-gcp-5.11*
ubuntu/linux-gcp-5.13*
ubuntu/linux-gcp-5.8*
ubuntu/linux-gke*
ubuntu/linux-gke-5.15*
ubuntu/linux-gkeop*
ubuntu/linux-gkeop-5.15*
ubuntu/linux-hwe-5.11*
ubuntu/linux-hwe-5.13*
ubuntu/linux-hwe-5.8*
ubuntu/linux-intel-5.13*
ubuntu/linux-oem-5.10*
ubuntu/linux-oem-5.13*
ubuntu/linux-oem-5.6*
ubuntu/linux-oracle-5.11*
ubuntu/linux-oracle-5.13*
ubuntu/linux-oracle-5.8*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.11*
ubuntu/linux-riscv-5.8*
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-aws-6.5*
ubuntu/linux-aws-6.8<6.8.0-1041.43~22.04.1
6.8.0-1041.43~22.04.1
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-6.5*
ubuntu/linux-azure-6.8<6.8.0-1041.47~22.04.1
6.8.0-1041.47~22.04.1
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-gcp-6.5*
ubuntu/linux-gcp-6.8<6.8.0-1042.45~22.04.1
6.8.0-1042.45~22.04.1
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-hwe-6.5*
ubuntu/linux-hwe-6.8<6.8.0-86.87~22.04.1
6.8.0-86.87~22.04.1
ubuntu/linux-ibm-6.8<6.8.0-1039.39~22.04.1
6.8.0-1039.39~22.04.1
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-lowlatency-hwe-6.5*
ubuntu/linux-lowlatency-hwe-6.8<6.8.0-86.87.1~22.04.1
6.8.0-86.87.1~22.04.1
ubuntu/linux-nvidia-6.2*
ubuntu/linux-nvidia-6.5*
ubuntu/linux-nvidia-6.8<6.8.0-1041.44~22.04.2
6.8.0-1041.44~22.04.2
ubuntu/linux-oem-5.17*
ubuntu/linux-oem-6.0*
ubuntu/linux-oem-6.1*
ubuntu/linux-oem-6.5*
ubuntu/linux-oracle-6.5*
ubuntu/linux-oracle-6.8<6.8.0-1038.39~22.04.1
6.8.0-1038.39~22.04.1
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.19*
ubuntu/linux-riscv-6.5*
ubuntu/linux-riscv-6.8<6.8.0-86.87~22.04.1
6.8.0-86.87~22.04.1
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-starfive-6.5*
ubuntu/linux-realtime-6.8<6.8.1-1036.37~22.04.1
6.8.1-1036.37~22.04.1
ubuntu/linux<6.8.0-86.87
6.8.0-86.87
ubuntu/linux-aws<6.8.0-1041.43
6.8.0-1041.43
ubuntu/linux-aws-6.14<6.14.0-1017.17~24.04.1
6.14.0-1017.17~24.04.1
ubuntu/linux-azure<6.8.0-1041.47
6.8.0-1041.47
ubuntu/linux-azure-6.11*
ubuntu/linux-azure-6.14<6.14.0-1017.17~24.04.1
6.14.0-1017.17~24.04.1
ubuntu/linux-azure-fde-6.14*
ubuntu/linux-azure-nvidia<6.8.0-1029.32
6.8.0-1029.32
ubuntu/linux-azure-nvidia-6.14*
ubuntu/linux-gcp<6.8.0-1042.45
6.8.0-1042.45
ubuntu/linux-gcp-6.11*
ubuntu/linux-gcp-6.14<6.14.0-1020.21~24.04.1
6.14.0-1020.21~24.04.1
ubuntu/linux-gke<6.8.0-1038.43
6.8.0-1038.43
ubuntu/linux-gkeop<6.8.0-1025.28
6.8.0-1025.28
ubuntu/linux-hwe-6.11*
ubuntu/linux-ibm<6.8.0-1039.39
6.8.0-1039.39
ubuntu/linux-lowlatency<6.8.0-86.87.1
6.8.0-86.87.1
ubuntu/linux-lowlatency-hwe-6.11*
ubuntu/linux-nvidia<6.8.0-1041.44
6.8.0-1041.44
ubuntu/linux-nvidia-6.11*
ubuntu/linux-nvidia-lowlatency<6.8.0-1041.44.1
6.8.0-1041.44.1
ubuntu/linux-nvidia-tegra<6.8.0-1012.12
6.8.0-1012.12
ubuntu/linux-oem-6.11*
ubuntu/linux-oem-6.14<6.14.0-1012.12
6.14.0-1012.12
ubuntu/linux-oem-6.8*
ubuntu/linux-oracle<6.8.0-1038.39
6.8.0-1038.39
ubuntu/linux-oracle-6.14<6.14.0-1017.17~24.04.1
6.14.0-1017.17~24.04.1
ubuntu/linux-raspi<6.8.0-1041.45
6.8.0-1041.45
ubuntu/linux-raspi-realtime*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-6.14<6.14.0-36.36.1~24.04.1
6.14.0-36.36.1~24.04.1
ubuntu/linux-xilinx<6.8.0-1018.19
6.8.0-1018.19
ubuntu/linux-bluefield<6.8.0-1012.16
6.8.0-1012.16
ubuntu/linux-raspi-realtime<6.8.0-2032.33
6.8.0-2032.33
ubuntu/linux-realtime<6.8.1-1036.37
6.8.1-1036.37
ubuntu/linux-realtime-6.14<6.14.0-1016.16~24.04.1
6.14.0-1016.16~24.04.1
ubuntu/linux-aws-fips<6.8.0-1041.43+fips1
6.8.0-1041.43+fips1
ubuntu/linux-azure-fips<6.8.0-1044.50+fips1
6.8.0-1044.50+fips1
ubuntu/linux-fips<6.8.0-86.87+fips1
6.8.0-86.87+fips1
ubuntu/linux-gcp-fips<6.8.0-1042.45+fips1
6.8.0-1042.45+fips1
ubuntu/linux-azure-fde*
ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-aws-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1041.43~22.04.1
  2. Upgrade

    Upgrade ubuntu/linux-azure-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1041.47~22.04.1
  3. Upgrade

    Upgrade ubuntu/linux-gcp-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1042.45~22.04.1
  4. Upgrade

    Upgrade ubuntu/linux-hwe-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-86.87~22.04.1
  5. Upgrade

    Upgrade ubuntu/linux-ibm-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1039.39~22.04.1
  6. Upgrade

    Upgrade ubuntu/linux-lowlatency-hwe-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-86.87.1~22.04.1
  7. Upgrade

    Upgrade ubuntu/linux-nvidia-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1041.44~22.04.2
  8. Upgrade

    Upgrade ubuntu/linux-oracle-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1038.39~22.04.1
  9. Upgrade

    Upgrade ubuntu/linux-riscv-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-86.87~22.04.1
  10. Upgrade

    Upgrade ubuntu/linux-realtime-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.1-1036.37~22.04.1
  11. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 6.8.0-86.87
  12. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 6.8.0-1041.43
  13. Upgrade

    Upgrade ubuntu/linux-aws-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1017.17~24.04.1
  14. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 6.8.0-1041.47
  15. Upgrade

    Upgrade ubuntu/linux-azure-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1017.17~24.04.1
  16. Upgrade

    Upgrade ubuntu/linux-azure-nvidia to a version that resolves this vulnerability.

    Fixed in 6.8.0-1029.32
  17. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 6.8.0-1042.45
  18. Upgrade

    Upgrade ubuntu/linux-gcp-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1020.21~24.04.1
  19. Upgrade

    Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.

    Fixed in 6.8.0-1038.43
  20. Upgrade

    Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.

    Fixed in 6.8.0-1025.28
  21. Upgrade

    Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.

    Fixed in 6.8.0-1039.39
  22. Upgrade

    Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.

    Fixed in 6.8.0-86.87.1
  23. Upgrade

    Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.

    Fixed in 6.8.0-1041.44
  24. Upgrade

    Upgrade ubuntu/linux-nvidia-lowlatency to a version that resolves this vulnerability.

    Fixed in 6.8.0-1041.44.1
  25. Upgrade

    Upgrade ubuntu/linux-nvidia-tegra to a version that resolves this vulnerability.

    Fixed in 6.8.0-1012.12
  26. Upgrade

    Upgrade ubuntu/linux-oem-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1012.12
  27. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 6.8.0-1038.39
  28. Upgrade

    Upgrade ubuntu/linux-oracle-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1017.17~24.04.1
  29. Upgrade

    Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.

    Fixed in 6.8.0-1041.45
  30. Upgrade

    Upgrade ubuntu/linux-riscv-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-36.36.1~24.04.1
  31. Upgrade

    Upgrade ubuntu/linux-xilinx to a version that resolves this vulnerability.

    Fixed in 6.8.0-1018.19
  32. Upgrade

    Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.

    Fixed in 6.8.0-1012.16
  33. Upgrade

    Upgrade ubuntu/linux-raspi-realtime to a version that resolves this vulnerability.

    Fixed in 6.8.0-2032.33
  34. Upgrade

    Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.

    Fixed in 6.8.1-1036.37
  35. Upgrade

    Upgrade ubuntu/linux-realtime-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1016.16~24.04.1
  36. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 6.8.0-1041.43+fips1
  37. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 6.8.0-1044.50+fips1
  38. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 6.8.0-86.87+fips1
  39. Upgrade

    Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.

    Fixed in 6.8.0-1042.45+fips1
  40. Compensating control

    Skip DIMM enumeration when the memory controller is disabled.

Event History

Nov 12, 2025
CVE Published
via MITRE·10:23 AM
Data Sourced
via MITRE·10:23 AM
Description
Data Sourced
via OSV·11:15 AM
DescriptionSeverityAffected Software
Data Sourced
via NVD·11:15 AM
Description

Frequently Asked Questions

1

What is the severity of CVE-2025-40157?

CVE-2025-40157 has been classified with a medium severity level but detailed risk assessment should be conducted based on specific use cases.

2

How do I fix CVE-2025-40157?

To fix CVE-2025-40157, ensure that you update to the latest version of the Linux kernel where this vulnerability is addressed.

3

What systems are affected by CVE-2025-40157?

CVE-2025-40157 affects Intel Granite Rapids servers that utilize the i10nm_edac driver in the Linux kernel.

4

What impact does CVE-2025-40157 have?

The impact of CVE-2025-40157 involves a potential call trace that may appear during the loading of the i10nm_edac driver.

5

Is CVE-2025-40157 exploit-related?

CVE-2025-40157 is not specifically exploit-related but can lead to undefined behavior under certain conditions.

Company

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