SB20261023131 - Access of Uninitialized Pointer in Linux kernel regulator driver

Description

This security bulletin contains information about 1 vulnerability.

1) Access of Uninitialized Pointer (CVE-ID: CVE-2026-99021)

CWE-ID: CWE-824 - Access of Uninitialized Pointer

CVSSv4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

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

The vulnerability exists due to an uninitialized pointer in the Linux kernel regulator subsystem when regulator_bulk_enable() reports a supply-enable failure using an array returned by of_regulator_bulk_get_all(). A local privileged user can trigger this failure path, if able to influence the affected regulator operations, to potentially cause a kernel crash when the uninitialized supply-name pointer is dereferenced.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/82ac8c4939bdbd064b4f54a580fbe4baf0d60e41
• https://git.kernel.org/stable/c/a3384ec2516a7cc567bd7c09029282494469b247
• https://git.kernel.org/stable/c/e2151c29cec73f6cc70abf1c7cbc7b9b202489f5