CVE-2025-40157 (GCVE-0-2025-40157)

Vulnerability from cvelistv5 – Published: 2025-11-12 10:23 – Updated: 2025-12-01 06:19
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: EDAC/i10nm: Skip DIMM enumeration on a disabled memory controller When loading the i10nm_edac driver on some Intel Granite Rapids servers, a call trace may appear as follows: UBSAN: shift-out-of-bounds in drivers/edac/skx_common.c:453:16 shift exponent -66 is negative ... __ubsan_handle_shift_out_of_bounds+0x1e3/0x390 skx_get_dimm_info.cold+0x47/0xd40 [skx_edac_common] i10nm_get_dimm_config+0x23e/0x390 [i10nm_edac] skx_register_mci+0x159/0x220 [skx_edac_common] i10nm_init+0xcb0/0x1ff0 [i10nm_edac] ... 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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ba987eaaabf99b462cdfed86274e3455d5126349 , < 8100b6c0f9089d5b156642b81270ce27fff17490 (git)
Affected: ba987eaaabf99b462cdfed86274e3455d5126349 , < 1652f14cf3bef5a4baa232de954fc22bdcaa78fe (git)
Affected: ba987eaaabf99b462cdfed86274e3455d5126349 , < c20da24272f1ac79e9f9083bba577d049cd02bbb (git)
Affected: ba987eaaabf99b462cdfed86274e3455d5126349 , < 2e6fe1bbefd9c059c3787d1c620fe67343a94dff (git)
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    Linux Linux Affected: 6.3
Unaffected: 0 , < 6.3 (semver)
Unaffected: 6.6.112 , ≤ 6.6.* (semver)
Unaffected: 6.12.53 , ≤ 6.12.* (semver)
Unaffected: 6.17.3 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/edac/i10nm_base.c"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nEDAC/i10nm: Skip DIMM enumeration on a disabled memory controller\n\nWhen loading the i10nm_edac driver on some Intel Granite Rapids servers,\na call trace may appear as follows:\n\n  UBSAN: shift-out-of-bounds in drivers/edac/skx_common.c:453:16\n  shift exponent -66 is negative\n  ...\n  __ubsan_handle_shift_out_of_bounds+0x1e3/0x390\n  skx_get_dimm_info.cold+0x47/0xd40 [skx_edac_common]\n  i10nm_get_dimm_config+0x23e/0x390 [i10nm_edac]\n  skx_register_mci+0x159/0x220 [skx_edac_common]\n  i10nm_init+0xcb0/0x1ff0 [i10nm_edac]\n  ...\n\nThis occurs because some BIOS may disable a memory controller if there\naren\u0027t any memory DIMMs populated on this memory controller. The DIMMMTR\nregister of this disabled memory controller contains the invalid value\n~0, resulting in the call trace above.\n\nFix this call trace by skipping DIMM enumeration on a disabled memory\ncontroller."
        }
      ],
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        "dateUpdated": "2025-12-01T06:19:08.224Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40157",
    "datePublished": "2025-11-12T10:23:29.258Z",
    "dateReserved": "2025-04-16T07:20:57.176Z",
    "dateUpdated": "2025-12-01T06:19:08.224Z",
    "state": "PUBLISHED"
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  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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