In the Linux kernel, the following vulnerability has been resolved: vhost: vringh: Fix copy_to_iter return value check The return value of copy_to_iter can't be negative, check whether the copied length is equal to the requested length instead of checking for negative values.
Conclusion & alert: CVE-2025-40056 is rated Low Risk (9.5/100): low exploitation likelihood (EPSS 0.03%). 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.
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 | 2026-03-26 | 0.05% | 0.03% | -0.02% |
| 2 | 2026-02-27 | 0.02% | 0.05% | +0.03% |
| 3 | 2025-10-28 | — | 0.02% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
No CVSS data in dataset for this CVE.
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2025-40056 unimportant 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-2025-40056 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2025-40056 |
suse
|
medium | CVE-2025-40056 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, …), 1125 product×package rows across 226 product lines (Container suse/sl-micro/6.0/baremetal-os-container, Container suse/sl-micro/6.0/base-os-container, … (226 product lines)): Fixed 676, Known Affected 231, Known Not Affected 197, First Fixed 21. | https://www.suse.com/security/cve/CVE-2025-40056/ |
ubuntu
|
medium | CVE-2025-40056 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 177, released 127, not-affected 82, needed 7, pending 2. | https://ubuntu.com/security/CVE-2025-40056 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| No affected products in dataset. | |||