CVE-2026-46155
CRITICALsmb/client: fix out-of-bounds read in smb2_compound_op()
Title source: cnaDescription
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 (5)
Core 5
Core References
Scores
CVSS v3
9.1
EPSS
0.0048
EPSS Percentile
38.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Details
CWE
CWE-125
Status
published
Products (20)
linux/Kernel
< 6.6.140linux
linux/Kernel
6.13.0 - 7.0.7linux
linux/Kernel
6.7.0 - 6.12.88linux
linux/Kernel
6.9.0 - 6.18.30linux
Linux/Linux
< 6.9
Linux/Linux
6.12.88 - 6.12.*
Linux/Linux
6.18.30 - 6.18.*
Linux/Linux
6.6.140 - 6.6.*
Linux/Linux
6.6.32 - 6.6.140
Linux/Linux
6.9
... and 10 more
Published
May 28, 2026
Tracked Since
May 28, 2026