CVE-2024-53681Public exploit

System crash via discovery-NQN heap overflow

Published Jan 15, 2025 · Updated May 11, 2026

Heap buffer overflow in Linux allows local users to crash affected kernels via an NVMe target discovery-NQN update. The nvmet_root_discovery_nqn_store function clears NVMF_NQN_FIELD_LEN bytes in a heap string allocated only to the prior NQN length, writing beyond that allocation before copying the replacement. Reachability requires permission to write the NVMe target discovery_nqn configfs attribute; the documented impact is a local system crash without data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in Linux allows local users to crash affected kernels via an NVMe target discovery-NQN update. The nvmet_root_discovery_nqn_store function clears NVMF_NQN_FIELD_LEN bytes in a heap string allocated only to the prior NQN length, writing beyond that allocation before copying the replacement. Reachability requires permission to write the NVMe target discovery_nqn configfs attribute; the documented impact is a local system crash without data disclosure or modification.

The record

CVE
CVE-2024-53681
Published
Jan 15, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-120, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 15, 2025CVE 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=6.9
  2. Affected versionversion=95409e277d8343810adf8700d29d4329828d452b <4db3d750ac7e894278ef1cb1c53cc7d883060496
  3. Affected versionversion=95409e277d8343810adf8700d29d4329828d452b <86645d8d062af3fdcbdaa0a289b95de55bca827d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.9; version=95409e277d8343810adf8700d29d4329828d452b <4db3d750ac7e894278ef1cb1c53cc7d883060496; version=95409e277d8343810adf8700d29d4329828d452b <86645d8d062af3fdcbdaa0a289b95de55bca827d

Published CVSS scores

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

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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