CVE-2026-46155

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7449d736bbbd160c76b01b8fcdf72f58a8757d4b < dffb44b2e06a2908e249f0f93156fc987eee1d1caffected
LinuxLinuxea41367b2a602f602ea6594fc4a310520dcc64f4 < 9b3af35645ff9cd334edc130249f9a2fb2bea25faffected
LinuxLinuxea41367b2a602f602ea6594fc4a310520dcc64f4 < 512d33bc8ea4ea5c19728ee118715f4b1f4d1926affected
LinuxLinuxea41367b2a602f602ea6594fc4a310520dcc64f4 < a16f70a71be4b5a4eccf39a9bf09b47285f4cb7caffected
LinuxLinuxea41367b2a602f602ea6594fc4a310520dcc64f4 < 8d09328dfda089675e4c049f3f256064a1d1996baffected
LinuxLinux6.6.32 < 6.6.140affected
LinuxLinux6.9affected
LinuxLinux0 < 6.9unaffected
LinuxLinux6.6.140 <= 6.6.*unaffected
LinuxLinux6.12.88 <= 6.12.*unaffected
LinuxLinux6.18.30 <= 6.18.*unaffected
LinuxLinux7.0.7 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References