CVE-2024-56730

Local crash via unchecked allocation failure

Published Dec 29, 2024 · Updated May 11, 2026

A NULL-pointer dereference in Linux kernel 6.12 allows local users to crash the system when memory exhaustion occurs during USB 9P gadget setup. The usb9pfs_alloc_instance() path in net/9p/trans_usbg.c tests kzalloc() with IS_ERR(), so a NULL allocation is accepted and stored as the device pointer. Reachability requires local low-privilege access, the USB gadget 9P transport, and memory exhaustion; the bounded consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A NULL-pointer dereference in Linux kernel 6.12 allows local users to crash the system when memory exhaustion occurs during USB 9P gadget setup. The usb9pfs_alloc_instance() path in net/9p/trans_usbg.c tests kzalloc() with IS_ERR(), so a NULL allocation is accepted and stored as the device pointer. Reachability requires local low-privilege access, the USB gadget 9P transport, and memory exhaustion; the bounded consequence is a kernel crash.

The record

CVE
CVE-2024-56730
Published
Dec 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 29, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.12
  2. Affected versionversion=a3be076dc174d9022a71a12554feb4c97b5c4d5c <2cdb416de8b5795fd25fadcb69e1198b6df6d8cc
  3. Affected versionversion=a3be076dc174d9022a71a12554feb4c97b5c4d5c <ff1060813d9347e8c45c8b8cff93a4dfdb6726ad

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.12; version=a3be076dc174d9022a71a12554feb4c97b5c4d5c <2cdb416de8b5795fd25fadcb69e1198b6df6d8cc; version=a3be076dc174d9022a71a12554feb4c97b5c4d5c <ff1060813d9347e8c45c8b8cff93a4dfdb6726ad

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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