CVE-2026-31624

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-31624
In the Linux kernel, the following vulnerability has been resolved: HID: core: clamp report_size in s32ton() to avoid undefined shift s32ton() shifts by n-1 where n is the field's report_size, a value that comes directly from a HID device. The HID parser bounds report_size only to <= 256, so a broken HID device can supply a report descriptor with a wide field that triggers shift exponents up to 256 on a 32-bit type when an output report is built via hid_output_field() or hid_set_field(). Commit ec61b41918587 ("HID: core: fix shift-out-of-bounds in hid_report_raw_event") added the same n > 32 clamp to the function snto32(), but s32ton() was never given the same fix as I guess syzbot hadn't figured out how to fuzz a device the same way. Fix this up by just clamping the max value of n, just like snto32() does.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/58386f00af710922cafb0fb69211497beddfaa95 Patch
https://git.kernel.org/stable/c/69c02ffde6ed4d535fa4e693a9e572729cad3d0d Patch
https://git.kernel.org/stable/c/8a8333237f1f5caab8d4c3d2c2e7578c4263a97f Patch
https://git.kernel.org/stable/c/932ae5309e53561197aa7d1606c7cf63af10e24f Patch
https://git.kernel.org/stable/c/97014719bb8fccb1ffcbbc299e84b1f11b114195 Patch
https://git.kernel.org/stable/c/ea363a34086ddb4231adc581a7f36c39ec154bfc Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.20:-:*:*:*:*:*:*
History

28 Apr 2026, 14:02

Type Values Removed Values Added
CWE NVD-CWE-noinfo
First Time Linux
Linux linux Kernel
CPE cpe:2.3:o:linux:linux_kernel:2.6.20:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
References () https://git.kernel.org/stable/c/58386f00af710922cafb0fb69211497beddfaa95 - () https://git.kernel.org/stable/c/58386f00af710922cafb0fb69211497beddfaa95 - Patch
References () https://git.kernel.org/stable/c/69c02ffde6ed4d535fa4e693a9e572729cad3d0d - () https://git.kernel.org/stable/c/69c02ffde6ed4d535fa4e693a9e572729cad3d0d - Patch
References () https://git.kernel.org/stable/c/8a8333237f1f5caab8d4c3d2c2e7578c4263a97f - () https://git.kernel.org/stable/c/8a8333237f1f5caab8d4c3d2c2e7578c4263a97f - Patch
References () https://git.kernel.org/stable/c/932ae5309e53561197aa7d1606c7cf63af10e24f - () https://git.kernel.org/stable/c/932ae5309e53561197aa7d1606c7cf63af10e24f - Patch
References () https://git.kernel.org/stable/c/97014719bb8fccb1ffcbbc299e84b1f11b114195 - () https://git.kernel.org/stable/c/97014719bb8fccb1ffcbbc299e84b1f11b114195 - Patch
References () https://git.kernel.org/stable/c/ea363a34086ddb4231adc581a7f36c39ec154bfc - () https://git.kernel.org/stable/c/ea363a34086ddb4231adc581a7f36c39ec154bfc - Patch

27 Apr 2026, 14:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/932ae5309e53561197aa7d1606c7cf63af10e24f -

27 Apr 2026, 12:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/69c02ffde6ed4d535fa4e693a9e572729cad3d0d -

24 Apr 2026, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-24 15:16

Updated : 2026-04-28 14:02

NVD link : CVE-2026-31624

Mitre link : CVE-2026-31624

CVE.ORG link : CVE-2026-31624

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo