CVE-2026-31689 (GCVE-0-2026-31689)
Vulnerability from cvelistv5
Published
2026-04-27 17:34
Modified
2026-04-27 17:34
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: EDAC/mc: Fix error path ordering in edac_mc_alloc() When the mci->pvt_info allocation in edac_mc_alloc() fails, the error path will call put_device() which will end up calling the device's release function. However, the init ordering is wrong such that device_initialize() happens *after* the failed allocation and thus the device itself and the release function pointer are not initialized yet when they're called: MCE: In-kernel MCE decoding enabled. ------------[ cut here ]------------ kobject: '(null)': is not initialized, yet kobject_put() is being called. WARNING: lib/kobject.c:734 at kobject_put, CPU#22: systemd-udevd CPU: 22 UID: 0 PID: 538 Comm: systemd-udevd Not tainted 7.0.0-rc1+ #2 PREEMPT(full) RIP: 0010:kobject_put Call Trace: <TASK> edac_mc_alloc+0xbe/0xe0 [edac_core] amd64_edac_init+0x7a4/0xff0 [amd64_edac] ? __pfx_amd64_edac_init+0x10/0x10 [amd64_edac] do_one_initcall ... Reorder the calling sequence so that the device is initialized and thus the release function pointer is properly set before it can be used. This was found by Claude while reviewing another EDAC patch.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0bbb265f7089584aaa6d440805ca75ea4f3930d4
Version: 0bbb265f7089584aaa6d440805ca75ea4f3930d4
Version: 0bbb265f7089584aaa6d440805ca75ea4f3930d4
Version: 0bbb265f7089584aaa6d440805ca75ea4f3930d4
Version: 0bbb265f7089584aaa6d440805ca75ea4f3930d4
Version: 0bbb265f7089584aaa6d440805ca75ea4f3930d4
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{
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          "programFiles": [
            "drivers/edac/edac_mc.c"
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      "cpeApplicability": [
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          "nodes": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nEDAC/mc: Fix error path ordering in edac_mc_alloc()\n\nWhen the mci-\u003epvt_info allocation in edac_mc_alloc() fails, the error path\nwill call put_device() which will end up calling the device\u0027s release\nfunction.\n\nHowever, the init ordering is wrong such that device_initialize() happens\n*after* the failed allocation and thus the device itself and the release\nfunction pointer are not initialized yet when they\u0027re called:\n\n  MCE: In-kernel MCE decoding enabled.\n  ------------[ cut here ]------------\n  kobject: \u0027(null)\u0027: is not initialized, yet kobject_put() is being called.\n  WARNING: lib/kobject.c:734 at kobject_put, CPU#22: systemd-udevd\n  CPU: 22 UID: 0 PID: 538 Comm: systemd-udevd Not tainted 7.0.0-rc1+ #2 PREEMPT(full)\n  RIP: 0010:kobject_put\n  Call Trace:\n   \u003cTASK\u003e\n   edac_mc_alloc+0xbe/0xe0 [edac_core]\n   amd64_edac_init+0x7a4/0xff0 [amd64_edac]\n   ? __pfx_amd64_edac_init+0x10/0x10 [amd64_edac]\n   do_one_initcall\n   ...\n\nReorder the calling sequence so that the device is initialized and thus the\nrelease function pointer is properly set before it can be used.\n\nThis was found by Claude while reviewing another EDAC patch."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-27T17:34:27.793Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/aae95970fad2127a1bd49d8713c7cd0677dcd2d6"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3de72e2a2b9ee3a57734c1c068823e41a707715"
        },
        {
          "url": "https://git.kernel.org/stable/c/d20e98c2df9354cc744431ad8ccbf49405b8b40f"
        },
        {
          "url": "https://git.kernel.org/stable/c/87ce8ae511962e105bcb3534944208c6a9471ed9"
        },
        {
          "url": "https://git.kernel.org/stable/c/75825648ce984ca4cebb28e4bd2bf8c3a7e837c5"
        },
        {
          "url": "https://git.kernel.org/stable/c/51520e03e70d6c73e33ee7cbe0319767d05764fe"
        }
      ],
      "title": "EDAC/mc: Fix error path ordering in edac_mc_alloc()",
      "x_generator": {
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31689",
    "datePublished": "2026-04-27T17:34:27.793Z",
    "dateReserved": "2026-03-09T15:48:24.131Z",
    "dateUpdated": "2026-04-27T17:34:27.793Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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