by Kastro CVE-2026-46155
Linux Linux — smb/client: fix out-of-bounds read in smb2_compound_op()
Description · from the CVE record
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
ProductAffectedFixed inSource
Linux7449d736bbbd160c76b01b8fcdf72f58a8757d4b – < dffb44b2e06a2908e249f0f93156fc987eee1d1cdffb44b2e06a2908e249f0f93156fc987eee1d1cCNA
Linuxea41367b2a602f602ea6594fc4a310520dcc64f4 – < 9b3af35645ff9cd334edc130249f9a2fb2bea25f9b3af35645ff9cd334edc130249f9a2fb2bea25fCNA
Linuxea41367b2a602f602ea6594fc4a310520dcc64f4 – < 512d33bc8ea4ea5c19728ee118715f4b1f4d1926512d33bc8ea4ea5c19728ee118715f4b1f4d1926CNA
Linuxea41367b2a602f602ea6594fc4a310520dcc64f4 – < a16f70a71be4b5a4eccf39a9bf09b47285f4cb7ca16f70a71be4b5a4eccf39a9bf09b47285f4cb7cCNA
Linuxea41367b2a602f602ea6594fc4a310520dcc64f4 – < 8d09328dfda089675e4c049f3f256064a1d1996b8d09328dfda089675e4c049f3f256064a1d1996bCNA
Linux6.6.32 – < 6.6.1406.6.140CNA
Linux6.96.6.140CNA
Scores by source
Linux (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial