What’s Vulnerable › Vulnerabilities

CVE-2025-40051: vhost: vringh: Modify the return value check

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-28 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: vhost: vringh: Modify the return value check The return value of copy_from_iter and copy_to_iter can't be negative, check whether the copied lengths are equal.

Affected products

• Linux kernel: 6.0 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux kernel 6.18. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/78dc7362662fedaa1928fb8e4f27401c8322905d
• https://git.kernel.org/stable/c/82a8d0fda55b35361ee7f35b54fa2b66d7847d2b
• https://git.kernel.org/stable/c/baa37b1c7e29546f79c39bef0d18c4edc9f39bb1
• https://git.kernel.org/stable/c/cfa0654402c06d086201a9ff167eb95da5844fc3
• https://git.kernel.org/stable/c/db042925a5ab7a550b710addeadbf6f72e3a8a4b

Get alerted when CVE-2025-40051 or the next vulnerability affects your stack