Access of Uninitialized Pointer in Linux kernel - CVE-2026-93133

Vulnerability identifier: #VU152197

CSH Severity: Low

CVSS v4: 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]

CVE-ID: CVE-2026-93133

CWE-ID: CWE-824

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Linux kernel
Debian Linux
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux (Debian package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17
linux (Debian package) - update to 6.12.111-1

• 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

• Access of Uninitialized Pointer in Linux kernel acpi riscv driver
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more