CVE-2025-71118

Summary

In the Linux kernel, the following vulnerability has been resolved:

ACPICA: Avoid walking the Namespace if start_node is NULL

Although commit 0c9992315e73 ("ACPICA: Avoid walking the ACPI Namespace if it is not there") fixed the situation when both start_node and acpi_gbl_root_node are NULL, the Linux kernel mainline now still crashed on Honor Magicbook 14 Pro [1].

That happens due to the access to the member of parent_node in acpi_ns_get_next_node(). The NULL pointer dereference will always happen, no matter whether or not the start_node is equal to ACPI_ROOT_OBJECT, so move the check of start_node being NULL out of the if block.

Unfortunately, all the attempts to contact Honor have failed, they refused to provide any technical support for Linux.

The bad DSDT table's dump could be found on GitHub [2].

DMI: HONOR FMB-P/FMB-P-PCB, BIOS 1.13 05/08/2025

[ rjw: Subject adjustment, changelog edits ]

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b84edef48cc8afb41150949a87dcfa81bc95b53eaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ecb296286c8787895625bd4c53e9478db4ae139caffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7f9b951ed11842373851dd3c91860778356d62d3affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1bc34293dfbd266c29875206849b4f8e8177e6dfaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0d8bb08126920fd4b12dbf32d9250757c9064b36affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f91dad0a3b381244183ffbea4cec5a7a69d6f41eaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9d6c58dae8f6590c746ac5d0012ffe14a77539f0affected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux5.10.248 <= 5.10.*unaffected
LinuxLinux5.15.198 <= 5.15.*unaffected
LinuxLinux6.1.160 <= 6.1.*unaffected
LinuxLinux6.6.120 <= 6.6.*unaffected
LinuxLinux6.12.64 <= 6.12.*unaffected
LinuxLinux6.18.3 <= 6.18.*unaffected
LinuxLinux6.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References