{"id":"CVE-2026-99272","aliases":[],"cve":{"records":[{"id":"CVE-2026-99272","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.404Z","published":"2026-11-07T14:08:45.332Z","modified":"2026-11-07T14:08:45.332Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-11-07T14:08:45.332Z"}],"references":[{"url":"https://git.kernel.org/stable/c/1ba1937de005e261a8858f45bfef5da7458df94c","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/2ec9cdf469dd32bcf33073aeb30c08e9356e0ca1","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":"3.7","versionEndExcluding":"7.3.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"7.4-rc1"}]}]}]}],"prioritization":[]},"title":"smb: client: validate the data area in SMB2_read()","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: validate the data area in SMB2_read()\n\nSMB2_read() copies le32_to_cpu(rsp->DataLength) bytes from\n(char *)rsp + rsp->DataOffset without checking that the range lies\nwithin the response actually received. A READ response with\nDataOffset == 0 makes smb2_get_data_area_len() zero the data length, so\nsmb2_check_message() accepts a frame as short as the fixed response,\nwhile SMB2_read() still uses the server-supplied DataLength, capped only\nby CIFS_MAX_MSGSIZE and the caller's length.\n\nA malicious server can answer the synchronous read used by the\nmfsymlinks (or SFU) symlink parser with an 81-byte READ response\ncarrying DataOffset 0 and DataLength 1067, making the client copy 1067\nbytes from a 448-byte receive object (KASAN slab-out-of-bounds; up to\n16 KiB in the general case).\n\nClamp a zero (or header-overlapping) DataOffset to read_rsp_size, as\nhandle_read_data() does for the asynchronous path, and reject the\nresponse unless DataOffset + DataLength fits within rsp_iov.iov_len.\nThe SMB1 helper was fixed the same way in 5be5bdda5863.","score":null,"severity":"unknown","published":"2026-11-07T14:08:45.332Z","modified":"2026-11-07T14:08:45.332Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"d8e050398d23ef7c019c96200b80d73f4e5cec0c","status":"affected","lessThan":"1ba1937de005e261a8858f45bfef5da7458df94c","versionType":"git"},{"version":"d8e050398d23ef7c019c96200b80d73f4e5cec0c","status":"affected","lessThan":"2ec9cdf469dd32bcf33073aeb30c08e9356e0ca1","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99272"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"3.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.7","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-2026-99272"}],"remediation":[],"references":["https://git.kernel.org/stable/c/1ba1937de005e261a8858f45bfef5da7458df94c","https://git.kernel.org/stable/c/2ec9cdf469dd32bcf33073aeb30c08e9356e0ca1"],"sources":[{"name":"CVE","id":"CVE-2026-99272","modified":"2026-11-07T14:08:45.332Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-99272"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-11-07T14:15:42.835Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T01:10:30.655Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-07T14:45:32.535Z","attemptedAt":"2026-11-07T14:45:32.535Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-07T14:45:32.587Z","attemptedAt":"2026-11-07T14:45:32.587Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-11-07T14:45:32.334Z","attemptedAt":"2026-11-07T14:45:32.334Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-07T14:45:32.877Z","attemptedAt":"2026-11-07T14:45:32.877Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-99272","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99272","modified":"2026-11-07T14:17:02.477","checkedAt":"2026-11-07T14:45:32.535Z"}],"aiSummary":null}