Description
In the Linux kernel, the following vulnerability has been resolved:
smb/client: fix out-of-bounds read in smb2_compound_op()
If a server sends a truncated response but a large OutputBufferLength, and terminates the EA list early, check_wsl_eas() returns success without validating that the entire OutputBufferLength fits within iov_len.
Then smb2_compound_op() does: memcpy(idata->wsl.eas, data[0], size[0]);
Where size[0] is OutputBufferLength. If iov_len is smaller than size[0], memcpy can read beyond the end of the rsp_iov allocation and leak adjacent kernel heap memory.
Metrics
CVSS 3.1 9.1/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 7449d736bbbd160c76b01b8fcdf72f58a8757d4b, < dffb44b2e06a2908e249f0f93156fc987eee1d1c; >= ea41367b2a602f602ea6594fc4a310520dcc64f4, < 9b3af35645ff9cd334edc130249f9a2fb2bea25f; >= ea41367b2a602f602ea6594fc4a310520dcc64f4, < 512d33bc8ea4ea5c19728ee118715f4b1f4d1926; >= ea41367b2a602f602ea6594fc4a310520dcc64f4, < a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c; >= ea41367b2a602f602ea6594fc4a310520dcc64f4, < 8d09328dfda089675e4c049f3f256064a1d1996b; >= 6.6.32, < 6.6.140 |
| Linux | Linux | 6.9 |
References
- https://git.kernel.org/stable/c/512d33bc8ea4ea5c19728ee118715f4b1f4d1926Patch
- https://git.kernel.org/stable/c/8d09328dfda089675e4c049f3f256064a1d1996bPatch
- https://git.kernel.org/stable/c/9b3af35645ff9cd334edc130249f9a2fb2bea25fPatch
- https://git.kernel.org/stable/c/a16f70a71be4b5a4eccf39a9bf09b47285f4cb7cPatch
- https://git.kernel.org/stable/c/dffb44b2e06a2908e249f0f93156fc987eee1d1cPatch
Timeline
- Published
- May 28, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Modified