{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89632", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.738Z", "datePublished": "2026-09-11T19:45:27.325Z", "dateUpdated": "2026-09-11T19:45:27.325Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:45:27.325Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix use-before-check of ReparseDataLength in reparse_buf_ptr()\n\nreparse_buf_ptr() reads buf->ReparseDataLength before checking that\ncount covers the full fixed header:\n\n buf = (struct reparse_data_buffer *)((u8 *)io + off);\n len = sizeof(*buf); /* 8 bytes */\n rdlen = le16_to_cpu(buf->ReparseDataLength); /* offset 4, 2 bytes */\n\n if (count < len || count < rdlen + len) /* check comes after */\n\nstruct reparse_data_buffer has ReparseDataLength at offset 4. If a\nserver returns OutputCount < 6, the read at offset 4-5 reaches past\nthe end of the received data. The off+count bounds against iov_len\nwere already validated, but that does not protect against count being\nsmaller than sizeof(*buf).\n\nSplit the check: verify count >= sizeof(*buf) before reading\nReparseDataLength, then verify count covers the data region."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2inode.c"], "versions": [{"version": "a158bb66b1373866d9fd5997565a58a573085539", "lessThan": "711cf71300d7992f450600df8864917d3538679f", "status": "affected", "versionType": "git"}, {"version": "a158bb66b1373866d9fd5997565a58a573085539", "lessThan": "05f78e6cf34ea3a285053bd5999e08e8ac298bd5", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2inode.c"], "versions": [{"version": "6.6.32", "lessThan": "7.2.4", "status": "affected", "versionType": "semver"}, {"version": "6.6.32", "lessThan": "7.3-rc1", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.32", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.32", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/711cf71300d7992f450600df8864917d3538679f"}, {"url": "https://git.kernel.org/stable/c/05f78e6cf34ea3a285053bd5999e08e8ac298bd5"}], "title": "smb: client: fix use-before-check of ReparseDataLength in reparse_buf_ptr()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/client/smb2inode.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "711cf71300d7992f450600df8864917d3538679f", "status": "affected", "version": "a158bb66b1373866d9fd5997565a58a573085539", "versionType": "git"}, {"lessThan": "05f78e6cf34ea3a285053bd5999e08e8ac298bd5", "status": "affected", "version": "a158bb66b1373866d9fd5997565a58a573085539", "versionType": "git"}]}, {"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/client/smb2inode.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "7.2.4", "status": "affected", "version": "6.6.32", "versionType": "semver"}, {"lessThan": "7.3-rc1", "status": "affected", "version": "6.6.32", "versionType": "semver"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix use-before-check of ReparseDataLength in reparse_buf_ptr()\n\nreparse_buf_ptr() reads buf->ReparseDataLength before checking that\ncount covers the full fixed header:\n\n buf = (struct reparse_data_buffer *)((u8 *)io + off);\n len = sizeof(*buf); /* 8 bytes */\n rdlen = le16_to_cpu(buf->ReparseDataLength); /* offset 4, 2 bytes */\n\n if (count < len || count < rdlen + len) /* check comes after */\n\nstruct reparse_data_buffer has ReparseDataLength at offset 4. If a\nserver returns OutputCount < 6, the read at offset 4-5 reaches past\nthe end of the received data. The off+count bounds against iov_len\nwere already validated, but that does not protect against count being\nsmaller than sizeof(*buf).\n\nSplit the check: verify count >= sizeof(*buf) before reading\nReparseDataLength, then verify count covers the data region."}], "id": "CVE-2026-89632", "lastModified": "2026-09-11T20:19:48.763", "metrics": {}, "published": "2026-09-11T20:19:48.763", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/05f78e6cf34ea3a285053bd5999e08e8ac298bd5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/711cf71300d7992f450600df8864917d3538679f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel SMB client: Out-of-bounds read vulnerability", "id": "2532415", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532415"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in the Linux kernel's Server Message Block (SMB) client. A malicious server could exploit this vulnerability by sending specially crafted data, leading to an out-of-bounds read. This occurs because the `reparse_buf_ptr()` function reads data before properly validating the buffer size, allowing it to access memory beyond the intended boundary."], "name": "CVE-2026-89632", "public_date": "2026-09-11T19:45:27Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89632\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89632\nhttps://git.kernel.org/stable/c/05f78e6cf34ea3a285053bd5999e08e8ac298bd5\nhttps://git.kernel.org/stable/c/711cf71300d7992f450600df8864917d3538679f"], "threat_severity": "Moderate"}

{"created": "2026-09-12T10:00:08.636096+00:00", "updated": "2026-09-12T10:00:08.636102+00:00", "vendors": [], "weaknesses": ["CWE-125"]}