Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-31624

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
24/04/2026
Last modified:
28/04/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> HID: core: clamp report_size in s32ton() to avoid undefined shift<br /> <br /> s32ton() shifts by n-1 where n is the field&amp;#39;s report_size, a value that<br /> comes directly from a HID device. The HID parser bounds report_size<br /> only to 32 clamp to the function<br /> snto32(), but s32ton() was never given the same fix as I guess syzbot<br /> hadn&amp;#39;t figured out how to fuzz a device the same way.<br /> <br /> Fix this up by just clamping the max value of n, just like snto32()<br /> does.

Impact

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

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 2.6.20.1 (including) 6.6.136 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.12.83 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.18.24 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 6.19.14 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 7.0 (including) 7.0.1 (excluding)
cpe:2.3:o:linux:linux_kernel:2.6.20:-:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools