Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix OOB read in smb2_ioctl_query_info QUERY_INFO path smb2_ioctl_query_info() has two response-copy branches: PASSTHRU_FSCTL and the default QUERY_INFO path. The QUERY_INFO branch clamps qi.input_buffer_length to the server-reported OutputBufferLength and then copies qi.input_buffer_length bytes from qi_rsp->Buffer to userspace, but it never verifies that the flexible-array payload actually fits within rsp_iov[1].iov_len. A malicious server can return OutputBufferLength larger than the actual QUERY_INFO response, causing copy_to_user() to walk past the response buffer and expose adjacent kernel heap to userspace. Guard the QUERY_INFO copy with a bounds check on the actual Buffer payload. Use struct_size(qi_rsp, Buffer, qi.input_buffer_length) rather than an open-coded addition so the guard cannot overflow on 32-bit builds.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
f5778c398713692a16150ae96e5c8270bab8399f to < e66bdc0704977ecee667a81d38255b579c2353d0affectedf5778c398713692a16150ae96e5c8270bab8399f to < 9e203dbb5402897c43130fb171a2617008a91f45affectedf5778c398713692a16150ae96e5c8270bab8399f to < 1dd757379997b71a328a4b591ffaf481acd0ead1affectedf5778c398713692a16150ae96e5c8270bab8399f to < a34d456934fe42e4da5d2cc07787bf418bee99c6affectedf5778c398713692a16150ae96e5c8270bab8399f to < ac2f14e4705d020f04e806efa0d49ab8dc2b145faffectedf5778c398713692a16150ae96e5c8270bab8399f to < 078fae8f50adebb903ccf2252b44391324571e78affectedf5778c398713692a16150ae96e5c8270bab8399f to < 85fd46ee26a11841c670449508025965f61ce131affectedf5778c398713692a16150ae96e5c8270bab8399f to < a58c5af19ff0d6f44f6e9fe31e33a2c92223f77eaffected
Linux Linux
Default version status: affected
5.1affected0 to < 5.1unaffected5.10.259 to ≤ 5.10.*unaffected5.15.210 to ≤ 5.15.*unaffected6.1.175 to ≤ 6.1.*unaffected6.6.136 to ≤ 6.6.*unaffected6.12.84 to ≤ 6.12.*unaffected6.18.25 to ≤ 6.18.*unaffected7.0.2 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/e66bdc0704977ecee667a81d38255b579c2353d0 ↗
- https://git.kernel.org/stable/c/9e203dbb5402897c43130fb171a2617008a91f45 ↗
- https://git.kernel.org/stable/c/1dd757379997b71a328a4b591ffaf481acd0ead1 ↗
- https://git.kernel.org/stable/c/a34d456934fe42e4da5d2cc07787bf418bee99c6 ↗
- https://git.kernel.org/stable/c/ac2f14e4705d020f04e806efa0d49ab8dc2b145f ↗
- https://git.kernel.org/stable/c/078fae8f50adebb903ccf2252b44391324571e78 ↗
- https://git.kernel.org/stable/c/85fd46ee26a11841c670449508025965f61ce131 ↗
- https://git.kernel.org/stable/c/a58c5af19ff0d6f44f6e9fe31e33a2c92223f77e ↗
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html ↗