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Vulnerabilities CVE-2026-46155

CVE-2026-46155

Critical
Open
TLP:CLEAR

smb/client: fix out-of-bounds read in smb2_compound_op()

AI Analysis

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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.

Details

CVSS Score
9.1
EPSS Score
0.48%

39.2th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Confidence
90%
Published
May 28, 2026
Last Modified
Aug 5, 2026
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