发布于3月6日3月6日 Members Red Hat: CVE-2021-47386: kernel: hwmon: (w83791d) Fix NULL pointer dereference by removing unnecessary structure field (Multiple Advisories) Severity 4 CVSS (AV:L/AC:L/Au:M/C:N/I:N/A:C) Published 05/21/2024 Created 09/26/2024 Added 09/25/2024 Modified 12/05/2024 Description In the Linux kernel, the following vulnerability has been resolved: hwmon: (w83791d) Fix NULL pointer dereference by removing unnecessary structure field If driver read val value sufficient for (val & 0x08) && (!(val & 0x80)) && ((val & 0x7) == ((val >> 4) & 0x7)) from device then Null pointer dereference occurs. (It is possible if tmp = 0b0xyz1xyz, where same literals mean same numbers) Also lm75[] does not serve a purpose anymore after switching to devm_i2c_new_dummy_device() in w83791d_detect_subclients(). The patch fixes possible NULL pointer dereference by removing lm75[]. Found by Linux Driver Verification project (linuxtesting.org). [groeck: Dropped unnecessary continuation lines, fixed multi-line alignment] Solution(s) redhat-upgrade-kernel redhat-upgrade-kernel-rt References CVE-2021-47386 RHSA-2024:7000 RHSA-2024:7001 RHSA-2024:9315
