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CVE-2026-98204

Unknown

Last modified

CVE-2026-98204 is a vulnerability of currently unknown severity. 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..

Description

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 Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 82264d0cf7aef2247563c031ff2ab96579d5d0cc, < d01337c0892d1509500c727edf81380777c2dd0f; >= 82264d0cf7aef2247563c031ff2ab96579d5d0cc, < 7c800af1c6030a5f27d46ce7d6d5d75f9c1efaf8; >= 82264d0cf7aef2247563c031ff2ab96579d5d0cc, < 29fbcf5834f0a7f74bfd017c07da2411b35a4e2a; >= 82264d0cf7aef2247563c031ff2ab96579d5d0cc, < 50dd585bee7669eb165e5defcc35d17f3822cfbb; >= 82264d0cf7aef2247563c031ff2ab96579d5d0cc, < e022538e13dd1c82af5ec25ac28f12ca0ab26160; >= 82264d0cf7aef2247563c031ff2ab96579d5d0cc, < dc05ec97b8299e48e31367a9bc412c7e9c0e2b42; >= 82264d0cf7aef2247563c031ff2ab96579d5d0cc, < 9f0ce5e162eed8b68345abe839c59768bc60f99a; >= 82264d0cf7aef2247563c031ff2ab96579d5d0cc, < 51cfe54f815ae175c7d1126b983d4d7c89715004
LinuxLinux4.10

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98204?
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.
How severe is CVE-2026-98204?
Severity scoring for CVE-2026-98204 is pending analysis.
How do I fix CVE-2026-98204?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST