Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: hwmon: (pt5161l) Fix bugs in pt5161l_read_block_data() Fix two bugs in pt5161l_read_block_data(): 1. Buffer overrun: The local buffer rbuf is declared as u8 rbuf[24], but i2c_smbus_read_block_data() can return up to I2C_SMBUS_BLOCK_MAX (32) bytes. The i2c-core copies the data into the caller's buffer before the return value can be checked, so the post-read length validation does not prevent a stack overrun if a device returns more than 24 bytes. Resize the buffer to I2C_SMBUS_BLOCK_MAX. 2. Unexpected positive return on length mismatch: When all three retries are exhausted because the device returns data with an unexpected length, i2c_smbus_read_block_data() returns a positive byte count. The function returns this directly, and callers treat any non-negative return as success, processing stale or incomplete buffer contents. Return -EIO when retries are exhausted with a positive return value, preserving the negative error code on I2C failure.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 before 7eccabff1c9ec15e4b6fe186d5c147b13a9cdb4e; affected 1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 before 95d48e37a1304d6148406c799479c0fb505aefa7; affected 1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 before a11aa9c5fd9dfe62be7cfec1f2a7546afb77254c; affected 1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 before 24c73e93d6a756e1b8626bb259d2e07c5b89b370 |
| Linux / Linux | affected 6.9; unaffected 0 before 6.9; unaffected 6.12.86 through 6.12.*; unaffected 6.18.27 through 6.18.*; unaffected 7.0.4 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.