SB20261022268 - NULL pointer dereference in Linux kernel iio adc driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-98673)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to potentially cause a denial of service through a kernel crash.

The vulnerability exists due to a null pointer dereference in pac1934_acpi_parse_channel_config() in the Linux kernel PAC1934 ADC driver when a terminating byte is written after ACPI label duplication fails. A local user can trigger the affected configuration-processing path under allocation-failure conditions to potentially cause a kernel crash.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2eb7f097e15dc8935b49402456d01f3ab68f3ddd
• https://git.kernel.org/stable/c/64c82e7bd9c82b0c9276297df34a3579e8658f55
• https://git.kernel.org/stable/c/7996557c6b7d3b136668060057a790e058161dfe
• https://git.kernel.org/stable/c/b7ac07d0b1a44bf644733298e80fd1f22e2f0cc1