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CVE-2025-38180

kernel: Linux kernel: Use-After-Free vulnerability in ATM subsystem

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Severity

Moderate

Red Hat Product Security

7.1

CVSS 3.1

Review impact separately from score.

Published · July 4, 2025

Updated · July 30, 2026

Description

A flaw was found in the Linux kernel's Asynchronous Transfer Mode (ATM) subsystem. An authenticated local attacker could exploit a Use-After-Free (UAF) vulnerability in the /proc/net/atm/lec handling. This flaw occurs due to improper dev_put() calls without prior dev_hold() calls, leading to an imbalance in reference counting. Successful exploitation could allow the attacker to achieve privilege escalation or cause a denial of service.

Statement

Moderate: A Use-After-Free vulnerability in the Linux kernel's Asynchronous Transfer Mode (ATM) subsystem allows an authenticated local attacker to cause a denial of service or a leak in kernel internal information. This flaw affects Red Hat Enterprise Linux 7, 8, and 9. Exploitation requires the ATM subsystem to be active, which is not enabled by default in typical Red Hat Enterprise Linux installations.

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 · 7.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CWE-911 · Improper Update of Reference Count