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CVE-2025-39818

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: HID: intel-thc-hid: intel-thc: Fix incorrect pointer arithmetic in I2C regs save Improper use of secondary pointer (&dev->i2c_s…

Published Sep 16, 2025CWE-787EPSS 0.15%

Overview

CVE-2025-39818 is a high-severity vulnerability. It was published on September 16, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

HID: intel-thc-hid: intel-thc: Fix incorrect pointer arithmetic in I2C regs save

Improper use of secondary pointer (&dev->i2c_subip_regs) caused

kernel crash and out-of-bounds error:

BUG: KASAN: slab-out-of-bounds in _regmap_bulk_read+0x449/0x510

Write of size 4 at addr ffff888136005dc0 by task kworker/u33:5/5107

CPU: 3 UID: 0 PID: 5107 Comm: kworker/u33:5 Not tainted 6.16.0+ #3 PREEMPT(voluntary)

Workqueue: async async_run_entry_fn

Call Trace:

<TASK>

dump_stack_lvl+0x76/0xa0

print_report+0xd1/0x660

? __pfx__raw_spin_lock_irqsave+0x10/0x10

? kasan_complete_mode_report_info+0x26/0x200

kasan_report+0xe1/0x120

? _regmap_bulk_read+0x449/0x510

? _regmap_bulk_read+0x449/0x510

__asan_report_store4_noabort+0x17/0x30

_regmap_bulk_read+0x449/0x510

? __pfx__regmap_bulk_read+0x10/0x10

regmap_bulk_read+0x270/0x3d0

pio_complete+0x1ee/0x2c0 [intel_thc]

? __pfx_pio_complete+0x10/0x10 [intel_thc]

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/78d4cf0466c79452e47aa6f720afbde63e709cccRefgit.kernel.org/stable/c/a7fc15ed629be89e51e09b743277c53e0a0168f5

How CyberStrike helps

Frequently asked questions

What is CVE-2025-39818?

CVE-2025-39818 is a high-severity vulnerability. It was published on September 16, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-39818?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-39818?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-39818?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-39818 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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