CVE-2026-46155
Analyzed
Analyzed - Analysis Complete
Out-of-Bounds Read in Linux Kernel SMB Client
Publication date: 2026-05-28
Last updated on: 2026-06-09
Assigner: kernel.org
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | From 6.13 (inc) to 6.18.30 (exc) |
| linux | linux_kernel | From 6.19 (inc) to 7.0.7 (exc) |
| linux | linux_kernel | From 6.6.32 (inc) to 6.6.140 (exc) |
| linux | linux_kernel | From 6.9 (inc) to 6.12.88 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-125 | The product reads data past the end, or before the beginning, of the intended buffer. |
