{"id":"CVE-2026-98169","published":"2026-10-06T09:17:58.480","lastModified":"2026-10-07T07:17:03.450","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix potential OOB read in smb3_enum_snapshots()\n\nIf snapshot_array_size is smaller than GMT_TOKEN_SIZE,\nsmb3_enum_snapshots() sets ret_data_len to\nsizeof(struct smb_snapshot_array) without verifying the actual length\nof the server's reply.\n\nBecause SMB2_ioctl() places no lower bound on the server-supplied\nOutputCount and allocates retbuf to exactly that length, a short reply\nresults in ret_data_len exceeding the size of retbuf. The subsequent\ncopy_to_user() then reads past the end of retbuf, leaking adjacent slab\nmemory to userspace.  The subsequent clamp check is ineffective as it\nonly reduces ret_data_len.\n\nFix this by rejecting replies shorter than\nsizeof(struct smb_snapshot_array) with -EIO. Note that the bound is set\nto the 12-byte struct size rather than the 16-byte\nMIN_SNAPSHOT_ARRAY_SIZE defined in MS-SMB2 3.3.5.15.1, because 12 bytes\nis exactly what copy_to_user() attempts to read.","cvssScore":7.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/15a221c734b9d044ab769e7e3606b2cab96fb65a","tags":[]},{"url":"https://git.kernel.org/stable/c/1cdf0d304d820fb13bf0faf532c3459600f9ea43","tags":[]},{"url":"https://git.kernel.org/stable/c/210f0f1f67817e7d2348b86b5115a9b85ef5c98b","tags":[]},{"url":"https://git.kernel.org/stable/c/4775c3b7a597907e0b97556c7986fda238a377ae","tags":[]},{"url":"https://git.kernel.org/stable/c/74995ee8305a7c4d76ee70d6acd996a75eda3c03","tags":[]},{"url":"https://git.kernel.org/stable/c/dbe452a905dfe2804647530a9ff3d7e3826ed04d","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}