SB2026052881 - Improper Check or Handling of Exceptional Conditions in Linux kernel hwmon driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-46001)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local attacker to cause incorrect processing of stale or incomplete data.

The vulnerability exists due to improper error handling in pt5161l_read_block_data() when handling block data reads with an unexpected length. A local attacker can cause a device to repeatedly return data with an unexpected length so the function returns a positive value and callers process stale or incomplete data.

The issue occurs when all three retries are exhausted and a positive byte count is returned instead of an error.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/24c73e93d6a756e1b8626bb259d2e07c5b89b370
• https://git.kernel.org/stable/c/7eccabff1c9ec15e4b6fe186d5c147b13a9cdb4e
• https://git.kernel.org/stable/c/95d48e37a1304d6148406c799479c0fb505aefa7
• https://git.kernel.org/stable/c/a11aa9c5fd9dfe62be7cfec1f2a7546afb77254c