In the Linux kernel, the following vulnerability has been resolved:
Input: evdev - fix information leak in evdev_pass_values()
In evdev_pass_values(), the input_event structure is allocated on the
kernel stack and populated field-by-field. However, it is never fully
initialized. On architectures where struct input_event contains explicit
or implicit padding (such as the 32-bit __pad field on SPARC64), these
padding bytes are left uninitialized.
When this event structure is subsequently passed to the client buffer
and later copied to userspace, the uninitialized padding bytes leak
kernel stack memory, potentially exposing sensitive information.
Similar issues exist in __evdev_queue_syn_dropped and __pass_event.
Fix this by explicitly zeroing the entire event structure with memset()
before populating its fields. This ensures all padding bytes are cleared
before the data crosses the security boundary.
CVSS
No CVSS.
References
Configurations
No configuration.
History
No history.
Information
Published : 2026-08-22 16:16
Updated : 2026-08-25 06:18
NVD link : CVE-2026-74673
Mitre link : CVE-2026-74673
CVE.ORG link : CVE-2026-74673
JSON object : View
Products Affected
No product.
CWE
No CWE.