CVE-2025-39819
kernel: Linux kernel: Denial of Service via resource leak in SMB2 compound operations
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 16, 2025
Updated · June 30, 2026
Description
A flaw was found in the Linux kernel. An inconsistent update of the reference count in the smb2_compound_op function, particularly during memory allocation failures, could lead to resource leaks. A local attacker could exploit this to cause a Denial of Service (DoS) by exhausting system resources.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-772 · Missing Release of Resource after Effective Lifetime