ACPI: NFIT: core: Fix acpi_nfit_init() error cleanup

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64510
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:37 UTC
Updated2026-07-27 05:16:55 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ACPI: NFIT: core: Fix acpi_nfit_init() error cleanup If acpi_nfit_init() fails after adding the acpi_desc object to the acpi_descs list, that object is never removed from that list because the acpi_nfit_shutdown() devm action is not added for the NFIT device in that case. Next, the acpi_nfit_init() failure causes acpi_nfit_probe() to fail, the acpi_desc object is freed, and a dangling pointer is left behind in the acpi_descs. Any subsequent ACPI Machine Check Exception will trigger nfit_handle_mce() which iterates over acpi_descs and so a use-after-free will occur. Moreover, if acpi_nfit_probe() returns 0 after installing a notify handler for the NFIT device and without allocating the acpi_desc object and setting the NFIT device's driver data pointer, the acpi_desc object will be allocated by acpi_nfit_update_notify() and acpi_nfit_init() will be called to initialize it. Regardless of whether or not acpi_nfit_init() fails in that case, the acpi_nfit_shutdown() devm action is not added for the NFIT device and acpi_desc is never removed from the acpi_descs list. If the acpi_desc object is freed subsequently on driver removal, any subsequent ACPI MCE will lead to a use-after-free like in the previous case. To address the first issue mentioned above, make acpi_nfit_probe() call acpi_nfit_shutdown() directly on acpi_nfit_init() failures and to address the other one, add a remove callback to the driver and make it call acpi_nfit_shutdown(). Also, since it is now possible to pass NULL to acpi_nfit_shutdown() or the acpi_desc object passed to it may not have been initialized, add checks against NULL for acpi_desc and its nvdimm_bus field to that function and make acpi_nfit_unregister() clear the latter after unregistering the NVDIMM bus.

Risk And Classification

Primary CVSS: v3.1 7 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001110000 probability, percentile 0.015250000 (date 2026-07-29)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a61fe6f7902ecaa89d5e6c709490fc4324927134 ee82078e776ae31266cc70fdf62ac17c3c6f100a git Not specified
CNA Linux Linux affected a61fe6f7902ecaa89d5e6c709490fc4324927134 6ff054cc02a763914773b026cacb429e5fbf64fa git Not specified
CNA Linux Linux affected a61fe6f7902ecaa89d5e6c709490fc4324927134 b07d22a2d17ad6465c87bd5752bc70e4c16e0ee4 git Not specified
CNA Linux Linux affected a61fe6f7902ecaa89d5e6c709490fc4324927134 c127dbd832bd4b9aef8a749d9f491b74042f9b47 git Not specified
CNA Linux Linux affected a61fe6f7902ecaa89d5e6c709490fc4324927134 df7c92216a1583a76cb0cbf2f21cd68870609b05 git Not specified
CNA Linux Linux affected a61fe6f7902ecaa89d5e6c709490fc4324927134 3b2628f7682aea8d9ce09ad4b9a3bd144b451eaa git Not specified
CNA Linux Linux affected a61fe6f7902ecaa89d5e6c709490fc4324927134 7d69235bdc581a4346e9bcd6a8bea37d3e1abd25 git Not specified
CNA Linux Linux affected a61fe6f7902ecaa89d5e6c709490fc4324927134 38bf27511ef41bffebd157ec3eba41fc89ba59cd git Not specified
CNA Linux Linux affected 4.6 Not specified
CNA Linux Linux unaffected 4.6 semver Not specified
CNA Linux Linux unaffected 5.10.261 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.212 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.178 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/df7c92216a1583a76cb0cbf2f21cd68870609b05 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7d69235bdc581a4346e9bcd6a8bea37d3e1abd25 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3b2628f7682aea8d9ce09ad4b9a3bd144b451eaa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ee82078e776ae31266cc70fdf62ac17c3c6f100a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6ff054cc02a763914773b026cacb429e5fbf64fa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b07d22a2d17ad6465c87bd5752bc70e4c16e0ee4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c127dbd832bd4b9aef8a749d9f491b74042f9b47 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/38bf27511ef41bffebd157ec3eba41fc89ba59cd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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