CVE-2026-98204Input: rmi_smbus - fix out-of-bounds read in rmi_smb_write_block()
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 82264d0cf7aef2247563c031ff2ab96579d5d0cc before d01337c0892d1509500c727edf81380777c2dd0f; 82264d0cf7aef2247563c031ff2ab96579d5d0cc builds before 7c800af1c6030a5f27d46ce7d6d5d75f9c1efaf8; 82264d0cf7aef2247563c031ff2ab96579d5d0cc builds before 29fbcf5834f0a7f74bfd017c07da2411b35a4e2a; 82264d0cf7aef2247563c031ff2ab96579d5d0cc builds before 50dd585bee7669eb165e5defcc35d17f3822cfbb; from 82264d0cf7aef2247563c031ff2ab96579d5d0cc before e022538e13dd1c82af5ec25ac28f12ca0ab26160; from 82264d0cf7aef2247563c031ff2ab96579d5d0cc before dc05ec97b8299e48e31367a9bc412c7e9c0e2b42; 82264d0cf7aef2247563c031ff2ab96579d5d0cc builds before 9f0ce5e162eed8b68345abe839c59768bc60f99a; 82264d0cf7aef2247563c031ff2ab96579d5d0cc builds before 51cfe54f815ae175c7d1126b983d4d7c89715004 | CNA record |
References
- https://git.kernel.org/stable/c/d01337c0892d1509500c727edf81380777c2dd0f
- https://git.kernel.org/stable/c/7c800af1c6030a5f27d46ce7d6d5d75f9c1efaf8
- https://git.kernel.org/stable/c/29fbcf5834f0a7f74bfd017c07da2411b35a4e2a
- https://git.kernel.org/stable/c/50dd585bee7669eb165e5defcc35d17f3822cfbb
- https://git.kernel.org/stable/c/e022538e13dd1c82af5ec25ac28f12ca0ab26160
- https://git.kernel.org/stable/c/dc05ec97b8299e48e31367a9bc412c7e9c0e2b42
- https://git.kernel.org/stable/c/9f0ce5e162eed8b68345abe839c59768bc60f99a
- https://git.kernel.org/stable/c/51cfe54f815ae175c7d1126b983d4d7c89715004
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.