#VU106625 Use-after-free in Linux kernel - CVE-2025-21967

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Main Vulnerability Database Vulnerabilities #VU106625

#VU106625 Use-after-free in Linux kernel - CVE-2025-21967

Published: April 2, 2025 / Updated: May 11, 2025


Vulnerability identifier: #VU106625
Vulnerability risk: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2025-21967
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Linux kernel
Software vendor:
Linux Foundation

Description

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

The vulnerability exists due to a use-after-free error within the alloc_opinfo(), smb2_lease_break_noti(), wait_lease_breaking(), oplock_break(), smb_send_parent_lease_break_noti(), smb_lazy_parent_lease_break_close(), smb_grant_oplock(), smb_break_all_write_oplock() and smb_break_all_levII_oplock() functions in fs/smb/server/oplock.c, within the ksmbd_alloc_work_struct() and ksmbd_free_work_struct() functions in fs/smb/server/ksmbd_work.c. A local user can escalate privileges on the system.


Remediation

Install update from vendor's website.

External links