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.
References
Configurations
Configuration 1 (hide)
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History
No history.
Information
Published : 2026-05-27 14:17
Updated : 2026-06-17 10:52
NVD link : CVE-2026-46001
Mitre link : CVE-2026-46001
CVE.ORG link : CVE-2026-46001
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-787
Out-of-bounds Write