CVE-2026-46155
smb/client: fix out-of-bounds read in smb2_compound_op()
CVSS Score
9.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 28, 2026 |
| Last Updated | May 30, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
7449d736bbbd160c76b01b8fcdf72f58a8757d4b < dffb44b2e06a2908e249f0f93156fc987eee1d1c ea41367b2a602f602ea6594fc4a310520dcc64f4 < 9b3af35645ff9cd334edc130249f9a2fb2bea25f ea41367b2a602f602ea6594fc4a310520dcc64f4 < 512d33bc8ea4ea5c19728ee118715f4b1f4d1926 ea41367b2a602f602ea6594fc4a310520dcc64f4 < a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c ea41367b2a602f602ea6594fc4a310520dcc64f4 < 8d09328dfda089675e4c049f3f256064a1d1996b 6.6.32 < 6.6.140
Linux / Linux
6.9
References
git.kernel.org: https://git.kernel.org/stable/c/dffb44b2e06a2908e249f0f93156fc987eee1d1c git.kernel.org: https://git.kernel.org/stable/c/9b3af35645ff9cd334edc130249f9a2fb2bea25f git.kernel.org: https://git.kernel.org/stable/c/512d33bc8ea4ea5c19728ee118715f4b1f4d1926 git.kernel.org: https://git.kernel.org/stable/c/a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c git.kernel.org: https://git.kernel.org/stable/c/8d09328dfda089675e4c049f3f256064a1d1996b