Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix OOB struct field reads in move_smb2_ea_to_cifs() In move_smb2_ea_to_cifs(), the while (src_size > 0) loop condition is insufficient. It allows iteration to continue even if the remaining src_size is too small to contain a complete smb2_ea_info structure. Consequently, reads of ea_name_length and ea_value_length can occur out-of-bounds. Fix this by ensuring src_size >= sizeof(*src) before attempting to read any structure fields. Additionally, reject any next_entry_offset that is smaller than sizeof(*src) or that would advance the pointer beyond the available buffer. Note that for calls where the server returns a malformed EA list, the error returned to userspace changes from -ENODATA (getxattr) or -ERANGE (listxattr) to -EIO. This correctly signals a server protocol error rather than misleadingly indicating "attribute not present" or "output buffer too small".
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 95907fea4fd8ccc736e0a428e52159b4d42b9958 before 61812323c037a94e2e7f0db7ee740c34b126bffe; affected 95907fea4fd8ccc736e0a428e52159b4d42b9958 before d3546cecbf81d98bf3b472d341f981eb48c04f47; affected 95907fea4fd8ccc736e0a428e52159b4d42b9958 before 34a3942e787b9c59758115bd65fe1ec89d68c7a4; affected 95907fea4fd8ccc736e0a428e52159b4d42b9958 before 13efcd37a9b3d6ffa1579c3dda3e29c893ed9bca; affected 95907fea4fd8ccc736e0a428e52159b4d42b9958 before eeb5ef6083e1cefa2ef75041b5597ff228b8d7bb |
| Linux / Linux | affected 4.14; unaffected 0 before 4.14; 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
- https://git.kernel.org/stable/c/61812323c037a94e2e7f0db7ee740c34b126bffe
- https://git.kernel.org/stable/c/d3546cecbf81d98bf3b472d341f981eb48c04f47
- https://git.kernel.org/stable/c/34a3942e787b9c59758115bd65fe1ec89d68c7a4
- https://git.kernel.org/stable/c/13efcd37a9b3d6ffa1579c3dda3e29c893ed9bca
- https://git.kernel.org/stable/c/eeb5ef6083e1cefa2ef75041b5597ff228b8d7bb