CVE-2025-40035 | Input: uinput - zero-initialize uinput_ff_upload_compat to avoid info leak

In the Linux kernel, the following vulnerability has been resolved: Input: uinput - zero-initialize uinput_ff_upload_compat to avoid info leak Struct ff_effect_compat is embedded twice inside uinput_ff_upload_compat, contains internal padding. In particular, there is a hole after struct ff_replay to satisfy alignment requirements for the following union member. Without clearing the structure, copy_to_user() may leak stack data to userspace. Initialize ff_up_compat to zero before filling valid fields.

Published: 2025-10-28 Last update: 2026-04-15 Assigner: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Conclusion & alert: CVE-2025-40035 is rated Low Risk (18.1/100): low exploitation likelihood (EPSS 0.06%). Mandatory action: Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-40035

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-15 0.04% 0.06% +0.01%
2 2026-05-12 0.06% 0.04% -0.01%
3 2026-04-07 0.06%

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-40035

CVSS metrics for this CVE.

No CVSS data in dataset for this CVE.

Weakness enumeration for CVE-2025-40035

OS Trackers for CVE-2025-40035

vendor priority summary link
debian not yet assigned CVE-2025-40035 not yet assigned priority: Debian including 2 source packages (linux, linux-6.1), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6. https://security-tracker.debian.org/tracker/CVE-2025-40035
redhat low https://access.redhat.com/security/cve/CVE-2025-40035
suse medium CVE-2025-40035 severity moderate: SUSE including 488 source package names (13.2-6.19:libjitterentropy3-3.4.1-3.1, 13.2-6.19:libopenssl3-3.1.4-6.1, …), 996 product×package rows across 203 product lines (Container suse/sl-micro/6.0/baremetal-os-container, Container suse/sl-micro/6.0/base-os-container, … (203 product lines)): Fixed 744, Known Affected 231, First Fixed 21. https://www.suse.com/security/cve/CVE-2025-40035/
ubuntu medium CVE-2025-40035 medium priority: Ubuntu including 157 source packages (linux, linux-allwinner-5.19, …), 1405 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): DNE 1010, ignored 181, released 158, needed 49, not-affected 4, pending 3. https://ubuntu.com/security/CVE-2025-40035

Affected software / configurations for CVE-2025-40035

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2025-40035

cvelogic Threat Intelligence