{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-68786","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-24T10:30:51.036Z","datePublished":"2026-01-13T15:28:59.578Z","dateUpdated":"2026-05-11T21:53:19.839Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:53:19.839Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: skip lock-range check on equal size to avoid size==0 underflow\n\nWhen size equals the current i_size (including 0), the code used to call\ncheck_lock_range(filp, i_size, size - 1, WRITE), which computes `size - 1`\nand can underflow for size==0. Skip the equal case."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/vfs.c"],"versions":[{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"52fcbb92e0d3acfd1448b2a43b6595d540da5295","status":"affected","versionType":"git"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"da29cd197246c85c0473259f1cad897d9d28faea","status":"affected","versionType":"git"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"a6f4cfa3783804336491e0edcb250c25f9b59d33","status":"affected","versionType":"git"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"571204e4758a528fbd67330bd4b0dfbdafb33dd8","status":"affected","versionType":"git"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"5d510ac31626ed157d2182149559430350cf2104","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/vfs.c"],"versions":[{"version":"5.15","status":"affected"},{"version":"0","lessThan":"5.15","status":"unaffected","versionType":"semver"},{"version":"6.1.160","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.120","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.64","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.3","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19","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":"5.15","versionEndExcluding":"6.1.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.6.120"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.12.64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.18.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/52fcbb92e0d3acfd1448b2a43b6595d540da5295"},{"url":"https://git.kernel.org/stable/c/da29cd197246c85c0473259f1cad897d9d28faea"},{"url":"https://git.kernel.org/stable/c/a6f4cfa3783804336491e0edcb250c25f9b59d33"},{"url":"https://git.kernel.org/stable/c/571204e4758a528fbd67330bd4b0dfbdafb33dd8"},{"url":"https://git.kernel.org/stable/c/5d510ac31626ed157d2182149559430350cf2104"}],"title":"ksmbd: skip lock-range check on equal size to avoid size==0 underflow","x_generator":{"engine":"bippy-1.2.0"}}}}