CVE-2026-46155

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.

References

• https://git.kernel.org/stable/c/512d33bc8ea4ea5c19728ee118715f4b1f4d1926
• https://git.kernel.org/stable/c/8d09328dfda089675e4c049f3f256064a1d1996b
• https://git.kernel.org/stable/c/9b3af35645ff9cd334edc130249f9a2fb2bea25f
• https://git.kernel.org/stable/c/a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c
• https://git.kernel.org/stable/c/dffb44b2e06a2908e249f0f93156fc987eee1d1c