Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 82264d0cf7aef2247563c031ff2ab96579d5d0cc before d01337c0892d1509500c727edf81380777c2dd0f; affected 82264d0cf7aef2247563c031ff2ab96579d5d0cc before 7c800af1c6030a5f27d46ce7d6d5d75f9c1efaf8; affected 82264d0cf7aef2247563c031ff2ab96579d5d0cc before 29fbcf5834f0a7f74bfd017c07da2411b35a4e2a; affected 82264d0cf7aef2247563c031ff2ab96579d5d0cc before 50dd585bee7669eb165e5defcc35d17f3822cfbb; affected 82264d0cf7aef2247563c031ff2ab96579d5d0cc before e022538e13dd1c82af5ec25ac28f12ca0ab26160; affected 82264d0cf7aef2247563c031ff2ab96579d5d0cc before dc05ec97b8299e48e31367a9bc412c7e9c0e2b42; affected 82264d0cf7aef2247563c031ff2ab96579d5d0cc before 9f0ce5e162eed8b68345abe839c59768bc60f99a; affected 82264d0cf7aef2247563c031ff2ab96579d5d0cc before 51cfe54f815ae175c7d1126b983d4d7c89715004 |
| Linux / Linux | affected 4.10; unaffected 0 before 4.10; unaffected 5.10.271 through 5.10.*; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
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