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CVE-2026-98168

smb: client: fix reparse buffer bounds in cifs_query_reparse_point() PUBLISHED

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix reparse buffer bounds in cifs_query_reparse_point() In cifs_query_reparse_point(), the start >= end check before casting to struct reparse_data_buffer * only ensures the start pointer is within the response. It fails to verify that there is enough space remaining for the fixed 8-byte header of the structure. If a server provides a DataOffset that leaves less than 8 bytes remaining, the check passes, but subsequent reads of ReparseTag and ReparseDataLength will occur out-of-bounds. Fix this by ensuring the remaining space is at least the size of the reparse_data_buffer structure before accessing its fields.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 848d78e3625f15de09d34a562dc49a98b78a62f3 before aa00eead258e4fe8158a3a3e2d65facf06274abd; affected 48ca7139ab7f0bbed95ff7a901ea497017769657 before 3d67f155fe5813cfb02a551a9a12d6ea06a902e9; affected 56e84c64fc257a95728ee73165456b025c48d408 before d1152c96a3002e3df6b9a5b007cecaa7b19b4f79; affected 56e84c64fc257a95728ee73165456b025c48d408 before 8dc5db3a0e583ea8d31d0613cefd99e93e095c3c; affected 56e84c64fc257a95728ee73165456b025c48d408 before 5f0306e731e2f46e91419eae57eee3a241c055e0; affected c13b779d26b3702fba8f7d5fe757aba5bda85fd0; affected 6.6.94 before 6.6.160; affected 6.12.34 before 6.12.112; affected 6.15.3 before 6.16
Linux / Linuxaffected 6.16; unaffected 0 before 6.16; unaffected 6.6.160 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through *

CWE

No CWE identifiers supplied.

References