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CVE-2025-38556

Severity CVSS v4.0:
Pending analysis
Type:
CWE-125 Out-of-bounds Read
Publication date:
19/08/2025
Last modified:
19/01/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> HID: core: Harden s32ton() against conversion to 0 bits<br /> <br /> Testing by the syzbot fuzzer showed that the HID core gets a<br /> shift-out-of-bounds exception when it tries to convert a 32-bit<br /> quantity to a 0-bit quantity. Ideally this should never occur, but<br /> there are buggy devices and some might have a report field with size<br /> set to zero; we shouldn&amp;#39;t reject the report or the device just because<br /> of that.<br /> <br /> Instead, harden the s32ton() routine so that it returns a reasonable<br /> result instead of crashing when it is called with the number of bits<br /> set to 0 -- the same as what snto32() does.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): High

Base Score 3.x
7.10
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 2.6.20 (including) 6.12.46 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.15.10 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.16 (including) 6.16.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools