CVE-2026-31689 (GCVE-0-2026-31689)

Vulnerability from cvelistv5 – Published: 2026-04-27 17:34 – Updated: 2026-05-11 22:13
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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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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Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.169 , ≤ 6.1.* (semver)
Unaffected: 6.6.135 , ≤ 6.6.* (semver)
Unaffected: 6.12.82 , ≤ 6.12.* (semver)
Unaffected: 6.18.23 , ≤ 6.18.* (semver)
Unaffected: 6.19.13 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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}


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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.

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  • 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.
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