{"id":"CVE-2025-40051","title":"vhost: vringh: Modify the return value check","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nvhost: vringh: Modify the return value check\n\nThe return value of copy_from_iter and copy_to_iter can't be negative,\ncheck whether the copied lengths are equal.","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < db042925a5ab7a550b710addeadbf6f72e3a8a4b","Linux >= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < 78dc7362662fedaa1928fb8e4f27401c8322905d","Linux >= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < baa37b1c7e29546f79c39bef0d18c4edc9f39bb1","Linux >= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < cfa0654402c06d086201a9ff167eb95da5844fc3","Linux >= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < 82a8d0fda55b35361ee7f35b54fa2b66d7847d2b","Linux 6.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T21:56:30.680415Z"},"published":"2025-10-28","updated":"2026-10-15","sourceUpdated":"2026-10-15T22:02:36.974Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-40051","references":[{"url":"https://git.kernel.org/stable/c/db042925a5ab7a550b710addeadbf6f72e3a8a4b"},{"url":"https://git.kernel.org/stable/c/78dc7362662fedaa1928fb8e4f27401c8322905d"},{"url":"https://git.kernel.org/stable/c/baa37b1c7e29546f79c39bef0d18c4edc9f39bb1"},{"url":"https://git.kernel.org/stable/c/cfa0654402c06d086201a9ff167eb95da5844fc3"},{"url":"https://git.kernel.org/stable/c/82a8d0fda55b35361ee7f35b54fa2b66d7847d2b"}],"tags":["cve.org"],"epss":0.00165,"epssPercentile":0.057,"ingestedAt":"2026-10-15T22:48:25.539Z","slug":"CVE-2025-40051","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nvhost: vringh: Modify the return value check\n\nThe return value of copy_from_iter and copy_to_iter can't be negative,\ncheck whether the copied lengths are equal.\n\n## Affected\n\n- `Linux >= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < db042925a5ab7a550b710addeadbf6f72e3a8a4b`\n- `Linux >= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < 78dc7362662fedaa1928fb8e4f27401c8322905d`\n- `Linux >= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < baa37b1c7e29546f79c39bef0d18c4edc9f39bb1`\n- `Linux >= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < cfa0654402c06d086201a9ff167eb95da5844fc3`\n- `Linux >= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < 82a8d0fda55b35361ee7f35b54fa2b66d7847d2b`\n- `Linux 6.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}