{"id":"CVE-2026-99274","aliases":[],"cve":{"records":[{"id":"CVE-2026-99274","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.405Z","published":"2026-11-07T14:08:45.924Z","modified":"2026-11-10T18:15:27.974Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-11-10T18:15:27.974Z"}],"references":[{"url":"https://git.kernel.org/stable/c/8e0d425b808c367f5033eb72aa4528ae18473627","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/4a426ca5be7e3dedbe76575b967db04fbf01136f","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/31f6dbb29fe17fa9595c7e8b19fd92915b03a4ca","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/f5baa17a0f316c235d61623ac8e8fb32c2b3c0cc","tags":[],"source":"Linux"}],"weaknesses":[],"applicability":[{"source":"Linux","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.12.117"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.18.61"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"7.3.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"7.4-rc1"}]}]}]}],"prioritization":[]},"title":"smb: client: fix fiemap wild read on empty truncated response","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix fiemap wild read on empty truncated response\n\nsmb3_fiemap() treats -E2BIG from SMB2_ioctl() as a truncated range blob\nand loops for the next chunk. If the server reports\nSTATUS_BUFFER_OVERFLOW with OutputCount == 0, SMB2_ioctl() returns\n-E2BIG with out_data == NULL and out_data_len == 0, and the existing\nlength checks accept the empty result. The loop then evaluates\n\n\tnext = out_data[num - 1].file_offset + ...\n\nwith num == 0, reading 16 bytes before NULL.\n\nReject a truncated range blob that contains no range, so the resume\noffset is never computed from an empty response. Also require the last\nrange in a truncated blob to advance the resume offset without\noverflowing, and to stay within the requested range; a malicious or\nbroken server could otherwise make no progress or underflow len and loop\nforever. Free the previous response buffer before retrying.\n\nReproduced on 6.6.87.2 with a malicious SMB2 server that answers\nFSCTL_QUERY_ALLOCATED_RANGES with STATUS_BUFFER_OVERFLOW and\nOutputCount == 0; an FS_IOC_FIEMAP ioctl on the mount oopses in\ncifs_fiemap() with CR2 = fffffffffffffff8. The code path is unchanged\non mainline.","score":null,"severity":"unknown","published":"2026-11-07T14:08:45.924Z","modified":"2026-11-10T18:15:27.974Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"2f3ebaba13cebd8badfb9aed31c0cf3cc82eb4f4","status":"affected","lessThan":"8e0d425b808c367f5033eb72aa4528ae18473627","versionType":"git"},{"version":"2f3ebaba13cebd8badfb9aed31c0cf3cc82eb4f4","status":"affected","lessThan":"4a426ca5be7e3dedbe76575b967db04fbf01136f","versionType":"git"},{"version":"2f3ebaba13cebd8badfb9aed31c0cf3cc82eb4f4","status":"affected","lessThan":"31f6dbb29fe17fa9595c7e8b19fd92915b03a4ca","versionType":"git"},{"version":"2f3ebaba13cebd8badfb9aed31c0cf3cc82eb4f4","status":"affected","lessThan":"f5baa17a0f316c235d61623ac8e8fb32c2b3c0cc","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99274"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"5.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.2","versionType":"semver"},{"version":"6.12.117","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.61","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.3.2","status":"unaffected","lessThanOrEqual":"7.3.*","versionType":"semver"},{"version":"7.4-rc1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99274"}],"remediation":[],"references":["https://git.kernel.org/stable/c/8e0d425b808c367f5033eb72aa4528ae18473627","https://git.kernel.org/stable/c/4a426ca5be7e3dedbe76575b967db04fbf01136f","https://git.kernel.org/stable/c/31f6dbb29fe17fa9595c7e8b19fd92915b03a4ca","https://git.kernel.org/stable/c/f5baa17a0f316c235d61623ac8e8fb32c2b3c0cc"],"sources":[{"name":"CVE","id":"CVE-2026-99274","modified":"2026-11-10T18:15:27.974Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-99274"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-11-10T18:25:52.242Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T00:10:33.488Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-07T14:45:31.083Z","attemptedAt":"2026-11-07T14:45:31.083Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-07T14:45:31.083Z","attemptedAt":"2026-11-07T14:45:31.083Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-11-07T14:45:31.083Z","attemptedAt":"2026-11-07T14:45:31.083Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-07T14:45:30.914Z","attemptedAt":"2026-11-07T14:45:30.914Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-99274","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99274","modified":"2026-11-07T14:17:02.730","checkedAt":"2026-11-07T14:45:31.083Z"}],"aiSummary":null}