CVE-2024-38603

Service interrupt via leaked HNS3 IRQ vectors

Published Jun 19, 2024 · Updated May 11, 2026

Resource leak in the Linux kernel 6.0 through 6.9.2 allows local users to exhaust memory through failed HNS3 PMU initialization. The HNS3 PMU probe allocates PCI interrupt vectors, then registers a cleanup action without releasing those vectors when registration fails. Reachability requires HiSilicon HNS3 PMU hardware and a failed devm_add_action call; leaked kernel memory can interrupt service without exposing or modifying data.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in the Linux kernel 6.0 through 6.9.2 allows local users to exhaust memory through failed HNS3 PMU initialization. The HNS3 PMU probe allocates PCI interrupt vectors, then registers a cleanup action without releasing those vectors when registration fails. Reachability requires HiSilicon HNS3 PMU hardware and a failed devm_add_action call; leaked kernel memory can interrupt service without exposing or modifying data.

The record

CVE
CVE-2024-38603
Published
Jun 19, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 19, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=6.0
  2. Affected versionversion=66637ab137b44914356a9dc7a9b3f8ebcf0b0695 <1491a01ef5a98149048b12e208f6ed8e86ad10b9
  3. Affected versionversion=66637ab137b44914356a9dc7a9b3f8ebcf0b0695 <2fcffaaf529d5fe3fdc6c0ee65a6f266b74de782
  4. Affected versionversion=66637ab137b44914356a9dc7a9b3f8ebcf0b0695 <582c1aeee0a9e73010cf1c4cef338709860deeb0
  5. Affected versionversion=66637ab137b44914356a9dc7a9b3f8ebcf0b0695 <a7678a16c25b6ece1667ac681e3e783ff3de7a6f
  6. Affected versionversion=66637ab137b44914356a9dc7a9b3f8ebcf0b0695 <b1e86f1ef8fa796f8935be392457639f3a907d91

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.0; version=66637ab137b44914356a9dc7a9b3f8ebcf0b0695 <1491a01ef5a98149048b12e208f6ed8e86ad10b9; version=66637ab137b44914356a9dc7a9b3f8ebcf0b0695 <2fcffaaf529d5fe3fdc6c0ee65a6f266b74de782; version=66637ab137b44914356a9dc7a9b3f8ebcf0b0695 <582c1aeee0a9e73010cf1c4cef338709860deeb0; version=66637ab137b44914356a9dc7a9b3f8ebcf0b0695 <a7678a16c25b6ece1667ac681e3e783ff3de7a6f; version=66637ab137b44914356a9dc7a9b3f8ebcf0b0695 <b1e86f1ef8fa796f8935be392457639f3a907d91

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
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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