FKIE_CVE-2026-31689
Vulnerability from fkie_nvd - Published: 2026-04-27 18:16 - Updated: 2026-06-17 10:34
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_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | 7.0 | |
| linux | linux_kernel | 7.0 | |
| linux | linux_kernel | 7.0 | |
| linux | linux_kernel | 7.0 | |
| linux | linux_kernel | 7.0 | |
| linux | linux_kernel | 7.0 | |
| linux | linux_kernel | 7.0 |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/edac/edac_mc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
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"versionType": "git"
},
{
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},
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"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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}
]
},
{
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"version": "5.19"
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{
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"version": "0",
"versionType": "semver"
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{
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"status": "unaffected",
"version": "6.1.169",
"versionType": "semver"
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{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.135",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.82",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.23",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.13",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
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"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."
}
],
"id": "CVE-2026-31689",
"lastModified": "2026-06-17T10:34:14.720",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2026-04-27T18:16:54.387",
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"value": "CWE-476"
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"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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