CVE-2024-26839

Service interruption via leaked DMA allocations

Published Apr 17, 2024 · Updated May 11, 2026

A memory leak in the Linux kernel hfi1 driver allows local users to cause a service interrupt when device initialization fails. If dma_alloc_coherent fails for a credit-return array entry, init_credit_return exits without freeing dd->cr_base or entries allocated earlier. The path requires Intel Omni-Path hardware and an allocation failure; retained coherent DMA buffers can exhaust kernel memory and interrupt the host.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A memory leak in the Linux kernel hfi1 driver allows local users to cause a service interrupt when device initialization fails. If dma_alloc_coherent fails for a credit-return array entry, init_credit_return exits without freeing dd->cr_base or entries allocated earlier. The path requires Intel Omni-Path hardware and an allocation failure; retained coherent DMA buffers can exhaust kernel memory and interrupt the host.

The record

CVE
CVE-2024-26839
Published
Apr 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 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=4.3
  2. Affected versionversion=7724105686e718ac476a6ad3304fea2fbcfcffde <2e4f9f20b32658ef3724aa46f7aef4908d2609e3
  3. Affected versionversion=7724105686e718ac476a6ad3304fea2fbcfcffde <3fa240bb6b2dbb3e7a3ee1440a4889cbb6207eb7
  4. Affected versionversion=7724105686e718ac476a6ad3304fea2fbcfcffde <52de5805c147137205662af89ed7e083d656ae25
  5. Affected versionversion=7724105686e718ac476a6ad3304fea2fbcfcffde <809aa64ebff51eb170ee31a95f83b2d21efa32e2
  6. Affected versionversion=7724105686e718ac476a6ad3304fea2fbcfcffde <8412c86e89cc78d8b513cb25cf2157a2adf3670a
  7. Affected versionversion=7724105686e718ac476a6ad3304fea2fbcfcffde <b41d0ade0398007fb746213f09903d52a920e896
  8. Affected versionversion=7724105686e718ac476a6ad3304fea2fbcfcffde <cecfb90cf71d91e9efebd68b9e9b84661b277cc8
  9. Affected versionversion=7724105686e718ac476a6ad3304fea2fbcfcffde <f0d857ce31a6bc7a82afcdbadb8f7417d482604b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.3; version=7724105686e718ac476a6ad3304fea2fbcfcffde <2e4f9f20b32658ef3724aa46f7aef4908d2609e3; version=7724105686e718ac476a6ad3304fea2fbcfcffde <3fa240bb6b2dbb3e7a3ee1440a4889cbb6207eb7; version=7724105686e718ac476a6ad3304fea2fbcfcffde <52de5805c147137205662af89ed7e083d656ae25; version=7724105686e718ac476a6ad3304fea2fbcfcffde <809aa64ebff51eb170ee31a95f83b2d21efa32e2; version=7724105686e718ac476a6ad3304fea2fbcfcffde <8412c86e89cc78d8b513cb25cf2157a2adf3670a; version=7724105686e718ac476a6ad3304fea2fbcfcffde <b41d0ade0398007fb746213f09903d52a920e896; version=7724105686e718ac476a6ad3304fea2fbcfcffde <cecfb90cf71d91e9efebd68b9e9b84661b277cc8; version=7724105686e718ac476a6ad3304fea2fbcfcffde <f0d857ce31a6bc7a82afcdbadb8f7417d482604b

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.

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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-401Missing Release of Memory after Effective Lifetime

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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