Linux Kernel NULL Pointer Deref in ACPICA Leading to Crash on Honor MagicBook
CVE-2025-71118 Published on January 14, 2026
ACPICA: Avoid walking the Namespace if start_node is NULL
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 ]
Products Associated with CVE-2025-71118
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Affected Versions
Linux:- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below b84edef48cc8afb41150949a87dcfa81bc95b53e is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below ecb296286c8787895625bd4c53e9478db4ae139c is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 7f9b951ed11842373851dd3c91860778356d62d3 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 1bc34293dfbd266c29875206849b4f8e8177e6df is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 0d8bb08126920fd4b12dbf32d9250757c9064b36 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below f91dad0a3b381244183ffbea4cec5a7a69d6f41e is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 9d6c58dae8f6590c746ac5d0012ffe14a77539f0 is affected.
- Version 2.6.12 is affected.
- Before 2.6.12 is unaffected.
- Version 5.10.248, <= 5.10.* is unaffected.
- Version 5.15.198, <= 5.15.* is unaffected.
- Version 6.1.160, <= 6.1.* is unaffected.
- Version 6.6.120, <= 6.6.* is unaffected.
- Version 6.12.64, <= 6.12.* is unaffected.
- Version 6.18.3, <= 6.18.* is unaffected.
- Version 6.19, <= * is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.