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CVE-2024-42280

kernel: mISDN: Fix a use after free in hfcmulti_tx()

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Severity

Moderate

Red Hat Product Security

6.7

CVSS 3.1

Review impact separately from score.

Published · August 17, 2024

Updated · October 30, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

mISDN: Fix a use after free in hfcmulti_tx()

Don't dereference *sp after calling dev_kfree_skb(*sp).

Statement

This vulnerability is rated as Moderate because it requires local access and the presence of specialized ISDN hardware controllers. The affected mISDN driver is not loaded by default in standard Red Hat Enterprise Linux environments and is only utilized when relevant multi-port ISDN hardware is attached. A local user with administrative access could trigger this flaw to induce a kernel crash or potentially escalate privileges.

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 · 6.7
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CWE-416 · Use After Free