SB20260925221 - Access of Uninitialized Pointer in Linux kernel acpi riscv driver

Description

This security bulletin contains information about 1 vulnerability.

1) Access of Uninitialized Pointer (CVE-ID: CVE-2026-93133)

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

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to use of an uninitialized pointer in riscv_acpi_add_prt_dep() when processing ACPI PRT entries with unresolved source handles. A local user can trigger processing of an ACPI PRT entry with an unresolved source handle to cause a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/088c1c85921344d7244ca2e8d5d336ae7461de6e
• https://git.kernel.org/stable/c/20435bda13f1219891ed0ce41207e320a916ff9c
• https://git.kernel.org/stable/c/4cdcf4e19ed3127afd787f026d4ec56ae4d2a4ed
• https://git.kernel.org/stable/c/f8625752bfdf108a0000116aa583b3efe767b540