{"cve":"CVE-2026-99113","nvd":{"published":"2026-10-28T11:17:30.773","modified":"2026-10-28T11:17:30.773","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: zero the FS_OBJECT_ID_INFORMATION buffer before filling it in\n\nsmb2_get_info_filesystem() reports 64 bytes for FS_OBJECT_ID_INFORMATION,\nthat is the whole of struct object_id_info, but writes only 46 of them:\n\n - objid[] is 16 bytes, and when the volume UUID is not available only\n   sizeof(stfs.f_fsid) (8) bytes are copied into it;\n - extended_info.version_string[] is STRING_LENGTH (28) bytes, and only\n   strlen(\"1.1.0\") (5) bytes are copied into it.\n\nThe response buffer is zeroed on allocation (kvzalloc() in\nsmb2_allocate_rsp_buf()), so for a standalone request the remaining 31\nbytes are zero.  In a compound request they need not be.  The offset of\nthe next response is advanced by the length pinned for the previous one,\nso if a preceding command wrote its reply into the buffer and then\nfailed, smb2_set_err_rsp() pins only the short error response and the\nnext reply lands inside the area that has already been written.  Only\nthe header is cleared there:\n\n\tmemset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);\n\nThe client then receives up to 31 bytes of a response it was not meant\nto see, including one that failed with an access denied error.\n\nClear the structure before filling it in.  As a side effect\nversion_string is now NUL terminated.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/015fffa48e96ca8d73a627445341ccff86b02251","https://git.kernel.org/stable/c/399aa12450a61a5c73dc77e73f069ece9687c95d","https://git.kernel.org/stable/c/898cb4f2e12a5ddea1b2d821cc642c3100f46da7"],"products":[],"source":"nvd","synced_at":"2026-10-28T11:37:51.394563875+00:00"},"epss":null,"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}