EUVD-2026-93132
GHSA-qm76-89x6-cmqm
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Alert meAnalysisCVE.org
In the Linux kernel, the following vulnerability has been resolved:
Input: rmi_smbus - fix out-of-bounds read in rmi_smb_write_block()
When chunking writes into SMBus blocks in rmi_smb_write_block(), the loop calculates block_len using the original total length (len) instead of the remaining length (cur_len).
If len is greater than 32 bytes (SMB_MAX_COUNT), block_len remains 32 for every iteration, even on the final partial chunk where fewer than 32 bytes remain. This causes smb_block_write() to read 32 bytes from the advanced data buffer pointer, reading past the end of the input buffer.
Fix this by calculating block_len using cur_len and advancing the buffer and address pointers by block_len.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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Lifecycle Timeline
2Threat Intelligence Overview
CVE.org
EPSS
VulDB
How this decision was reached
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Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
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