CVE-2026-31689 (GCVE-0-2026-31689)
Vulnerability from cvelistv5 – Published: 2026-04-27 17:34 – Updated: 2026-04-27 17:34
VLAI?
Title
EDAC/mc: Fix error path ordering in edac_mc_alloc()
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux |
Affected:
0bbb265f7089584aaa6d440805ca75ea4f3930d4 , < aae95970fad2127a1bd49d8713c7cd0677dcd2d6
(git)
Affected: 0bbb265f7089584aaa6d440805ca75ea4f3930d4 , < d3de72e2a2b9ee3a57734c1c068823e41a707715 (git) Affected: 0bbb265f7089584aaa6d440805ca75ea4f3930d4 , < d20e98c2df9354cc744431ad8ccbf49405b8b40f (git) Affected: 0bbb265f7089584aaa6d440805ca75ea4f3930d4 , < 87ce8ae511962e105bcb3534944208c6a9471ed9 (git) Affected: 0bbb265f7089584aaa6d440805ca75ea4f3930d4 , < 75825648ce984ca4cebb28e4bd2bf8c3a7e837c5 (git) Affected: 0bbb265f7089584aaa6d440805ca75ea4f3930d4 , < 51520e03e70d6c73e33ee7cbe0319767d05764fe (git) |
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"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."
}
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"dateUpdated": "2026-04-27T17:34:27.793Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"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()",
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"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",
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"epss": {
"cve": "CVE-2026-31689",
"date": "2026-05-05",
"epss": "0.00032",
"percentile": "0.09112"
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"nvd": "{\"cve\":{\"id\":\"CVE-2026-31689\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-04-27T18:16:54.387\",\"lastModified\":\"2026-04-27T18:32:22.917\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/51520e03e70d6c73e33ee7cbe0319767d05764fe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/75825648ce984ca4cebb28e4bd2bf8c3a7e837c5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/87ce8ae511962e105bcb3534944208c6a9471ed9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aae95970fad2127a1bd49d8713c7cd0677dcd2d6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d20e98c2df9354cc744431ad8ccbf49405b8b40f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d3de72e2a2b9ee3a57734c1c068823e41a707715\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- 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.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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