{"id":"CVE-2025-40056","state":"PUBLISHED","title":"vhost: vringh: Fix copy_to_iter return value check","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvhost: vringh: Fix copy_to_iter return value check\n\nThe return value of copy_to_iter can't be negative, check whether the\ncopied length is equal to the requested length instead of checking for\nnegative values.","publishedAt":"2025-10-28T11:48:30.249Z","updatedAt":"2026-05-11T21:41:37.648Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"309bba39c945ac8ab8083ac05cd6cfe5822968e0","status":"affected","lessThan":"bd71e7e0a612740e4de5524880c7cd40293af5f7","versionType":"git"},{"version":"309bba39c945ac8ab8083ac05cd6cfe5822968e0","status":"affected","lessThan":"781226e11d5bdea0d69c7b5aa3cda874093c73b8","versionType":"git"},{"version":"309bba39c945ac8ab8083ac05cd6cfe5822968e0","status":"affected","lessThan":"b3a950d236e98440c07405ba597b11bce56a8050","versionType":"git"},{"version":"309bba39c945ac8ab8083ac05cd6cfe5822968e0","status":"affected","lessThan":"68aac2b335d474b938d154b9c95cbc58838cb2ce","versionType":"git"},{"version":"309bba39c945ac8ab8083ac05cd6cfe5822968e0","status":"affected","lessThan":"439263376c2c4e126cac0d07e4987568de4eaba5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/vhost/vringh.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.156","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.112","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.53","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.3","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/vhost/vringh.c"]}],"references":["https://git.kernel.org/stable/c/bd71e7e0a612740e4de5524880c7cd40293af5f7","https://git.kernel.org/stable/c/781226e11d5bdea0d69c7b5aa3cda874093c73b8","https://git.kernel.org/stable/c/b3a950d236e98440c07405ba597b11bce56a8050","https://git.kernel.org/stable/c/68aac2b335d474b938d154b9c95cbc58838cb2ce","https://git.kernel.org/stable/c/439263376c2c4e126cac0d07e4987568de4eaba5"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40056.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40056","state":"PUBLISHED","datePublished":"2025-10-28T11:48:30.249Z","dateUpdated":"2026-05-11T21:41:37.648Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.158Z"},"containers":{"cna":{"title":"vhost: vringh: Fix copy_to_iter return value check","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvhost: vringh: Fix copy_to_iter return value check\n\nThe return value of copy_to_iter can't be negative, check whether the\ncopied length is equal to the requested length instead of checking for\nnegative values."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"309bba39c945ac8ab8083ac05cd6cfe5822968e0","status":"affected","lessThan":"bd71e7e0a612740e4de5524880c7cd40293af5f7","versionType":"git"},{"version":"309bba39c945ac8ab8083ac05cd6cfe5822968e0","status":"affected","lessThan":"781226e11d5bdea0d69c7b5aa3cda874093c73b8","versionType":"git"},{"version":"309bba39c945ac8ab8083ac05cd6cfe5822968e0","status":"affected","lessThan":"b3a950d236e98440c07405ba597b11bce56a8050","versionType":"git"},{"version":"309bba39c945ac8ab8083ac05cd6cfe5822968e0","status":"affected","lessThan":"68aac2b335d474b938d154b9c95cbc58838cb2ce","versionType":"git"},{"version":"309bba39c945ac8ab8083ac05cd6cfe5822968e0","status":"affected","lessThan":"439263376c2c4e126cac0d07e4987568de4eaba5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/vhost/vringh.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.156","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.112","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.53","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.3","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/vhost/vringh.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/bd71e7e0a612740e4de5524880c7cd40293af5f7"},{"url":"https://git.kernel.org/stable/c/781226e11d5bdea0d69c7b5aa3cda874093c73b8"},{"url":"https://git.kernel.org/stable/c/b3a950d236e98440c07405ba597b11bce56a8050"},{"url":"https://git.kernel.org/stable/c/68aac2b335d474b938d154b9c95cbc58838cb2ce"},{"url":"https://git.kernel.org/stable/c/439263376c2c4e126cac0d07e4987568de4eaba5"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:41:37.648Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.1.156"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.6.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.12.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.17.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}