{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40291","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T07:20:57.185Z","datePublished":"2025-12-08T00:46:14.601Z","dateUpdated":"2026-05-11T21:46:30.603Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:46:30.603Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: fix regbuf vector size truncation\n\nThere is a report of io_estimate_bvec_size() truncating the calculated\nnumber of segments that leads to corruption issues. Check it doesn't\noverflow \"int\"s used later. Rough but simple, can be improved on top."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/rsrc.c"],"versions":[{"version":"9ef4cbbcb4ac3786a1a4164507511b76b2a572c5","lessThan":"826ce37a842633efe1bb763e4b13045d74060d72","status":"affected","versionType":"git"},{"version":"9ef4cbbcb4ac3786a1a4164507511b76b2a572c5","lessThan":"146eb58629f45f8297e83d69e64d4eea4b28d972","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/rsrc.c"],"versions":[{"version":"6.15","status":"affected"},{"version":"0","lessThan":"6.15","status":"unaffected","versionType":"semver"},{"version":"6.17.8","lessThanOrEqual":"6.17.*","status":"unaffected","versionType":"semver"},{"version":"6.18","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.17.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.18"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/826ce37a842633efe1bb763e4b13045d74060d72"},{"url":"https://git.kernel.org/stable/c/146eb58629f45f8297e83d69e64d4eea4b28d972"}],"title":"io_uring: fix regbuf vector size truncation","x_generator":{"engine":"bippy-1.2.0"}}}}