Use-after-free in Linux kernel - CVE-2025-68781

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Main Vulnerability Database Vulnerabilities #VU121385

Use-after-free in Linux kernel - CVE-2025-68781

Published: January 14, 2026


Vulnerability identifier: #VU121385
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-2025-68781
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a use-after-free error within the fsl_otg_remove() function in drivers/usb/phy/phy-fsl-usb.c. A local user can escalate privileges on the system.


Affected software

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

How to mitigate CVE-2025-68781

Install update from vendor's repository.

linux (Debian package) - addressed in versions 6.1.162-1, 6.12.69-1
linux (Ubuntu package) - addressed in versions 6.17.0-22.22, 6.17.0-1010.11
linux-aws (Ubuntu package) - addressed in versions 6.17.0-22.22~24.04.1, 6.17.0-1011.11, 6.17.0-1011.11~24.04.1, 6.17.0-1012.12, 6.17.0-1012.12~24.04.1
linux-realtime-6.17 (Ubuntu package) - update to 6.17.0-1010.11~24.04.1
linux-gcp (Ubuntu package) - addressed in versions 6.17.0-1012.12, 6.17.0-1012.12~24.04.1
linux-azure (Ubuntu package) - addressed in versions 6.17.0-1013.13, 6.17.0-1013.13~24.04.1, 6.17.0-1020.20
linux-raspi (Ubuntu package) - update to 6.17.0-1014.14

External References

Related Security Bulletins