iio: proximity: aw96103: validate firmware data length

Overview

In the Linux kernel, the following vulnerability has been resolved:

iio: proximity: aw96103: validate firmware data length

The firmware parser reads a length from the binary header and then uses it to walk six-byte register/value entries. A truncated firmware image can make the parser read beyond the copied firmware buffer. A value smaller than the four-byte count field also underflows, producing a very large length.

Read the little-endian field with get_unaligned_le32(), as previously proposed by David Lechner. Validate the header size, reject an underflowed length, ensure the resulting payload is contained in the firmware image, and require it to contain whole register/value entries.

Affected

• Linux >= 07b241262dcad07671c444ca955903325de28e9e < 4a9b9f2d4e26589afd0ac099c8e5593170dd5ac7
• Linux >= 07b241262dcad07671c444ca955903325de28e9e < 6501b032be217ecf47e793b78a05078cf0b604ad
• Linux >= 07b241262dcad07671c444ca955903325de28e9e < 815ae0b73b69ace207b6bbf7ef428b06491c3ddb
• Linux >= 07b241262dcad07671c444ca955903325de28e9e < 1a7c522a35477d70320bd64aba8e9de0c1058c6f
• Linux 6.12

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.