Bug 2482660 (CVE-2026-46155) - CVE-2026-46155 kernel: smb/client: fix out-of-bounds read in smb2_compound_op()
Summary: CVE-2026-46155 kernel: smb/client: fix out-of-bounds read in smb2_compound_op()
Keywords:
Status: NEW
Alias: CVE-2026-46155
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-28 11:08 UTC by OSIDB Bzimport
Modified: 2026-05-28 16:03 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:


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Description OSIDB Bzimport 2026-05-28 11:08:12 UTC
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.


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