Use-after-free in Linux kernel - CVE-2025-68373

Vulnerability identifier: #VU120406

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-68373

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the drivers/md/md.h. A local user can escalate privileges on the system.

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/90e3bb44c0a86e245d8e5c6520206fa113acb1ee
• https://git.kernel.org/stable/c/b4c5cf406062ad44cd178269571530c6435b2f3b
• https://git.kernel.org/stable/c/f0fae1debeb9102398ddf2ef69b4f5d395afafed

• Use-after-free in Linux kernel md driver
• 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