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Critical severity9.1NVD Advisory· Published May 28, 2026· Updated Jun 9, 2026

CVE-2026-46155

CVE-2026-46155

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.

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Affected products

82

Patches

Vulnerability mechanics

References

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CVE-2026-46155 · Critical · VYPR