Use of uninitialized resource in Linux kernel - CVE-2025-68751

Vulnerability identifier: #VU120965

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-68751

CWE-ID: CWE-908

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to use of uninitialized resource within the arch/s390/include/asm/fpu-insn.h. A local user can perform a denial of service (DoS) attack.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-gcp-6.17 (Ubuntu package)
linux-realtime-6.17 (Ubuntu package)
linux-azure (Ubuntu package)
linux-raspi (Ubuntu package)
linux-oem-6.17 (Ubuntu package)

Install update from vendor's repository.

linux (Ubuntu package) - addressed in versions 6.17.0-19.19, 6.17.0-19.19~24.04.2, 6.17.0-1009.9, 6.17.0-1009.9~24.04.1, 6.17.0-1009.9~24.04.2
linux-gcp-6.17 (Ubuntu package) - addressed in versions 6.17.0-1008.9, 6.17.0-1009.9~24.04.3
linux-realtime-6.17 (Ubuntu package) - update to 6.17.0-1008.9~24.04.1
linux-azure (Ubuntu package) - addressed in versions 6.17.0-1010.10, 6.17.0-1010.10~24.04.1
linux-raspi (Ubuntu package) - update to 6.17.0-1010.10
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1017.17

• https://git.kernel.org/stable/c/13dcd6308cb8f67134ee5d5d762b2a66363c695b
• https://git.kernel.org/stable/c/14e4e4175b64dd9216b522f6ece8af6997d063b2
• https://git.kernel.org/stable/c/946357a538bb47740635c25520924351d2d91544

• Use of uninitialized resource in Linux kernel include asm
• Ubuntu update for linux
• Ubuntu update for linux-gcp-6.17
• Ubuntu update for linux-realtime-6.17
• Ubuntu update for linux-azure
• Ubuntu update for linux-raspi
• Ubuntu update for linux-oem-6.17