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CVE-2026-64510

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

In 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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From a61fe6f7902ecaa89d5e6c709490fc4324927134 · fixed in ee82078e776ae31266cc70fdf62ac17c3c6f100a; From a61fe6f7902ecaa89d5e6c709490fc4324927134 · fixed in 6ff054cc02a763914773b026cacb429e5fbf64fa; From a61fe6f7902ecaa89d5e6c709490fc4324927134 · fixed in b07d22a2d17ad6465c87bd5752bc70e4c16e0ee4; From a61fe6f7902ecaa89d5e6c709490fc4324927134 · fixed in c127dbd832bd4b9aef8a749d9f491b74042f9b47; From a61fe6f7902ecaa89d5e6c709490fc4324927134 · fixed in df7c92216a1583a76cb0cbf2f21cd68870609b05; From a61fe6f7902ecaa89d5e6c709490fc4324927134 · fixed in 3b2628f7682aea8d9ce09ad4b9a3bd144b451eaa; From a61fe6f7902ecaa89d5e6c709490fc4324927134 · fixed in 7d69235bdc581a4346e9bcd6a8bea37d3e1abd25; From a61fe6f7902ecaa89d5e6c709490fc4324927134 · fixed in 38bf27511ef41bffebd157ec3eba41fc89ba59cd

  • Linux Linux

    4.6

  • KernelLinux

    From 4.6.0 · fixed in 5.10.261; From 5.11.0 · fixed in 5.15.212; From 5.16.0 · fixed in 6.1.178; From 6.2.0 · fixed in 6.6.145; From 6.7.0 · fixed in 6.12.97; From 6.13.0 · fixed in 6.18.40; From 6.19.0 · fixed in 7.1.4

References 8

git.kernel.org