CVE-2024-44976

Local system crash via DMA table overflow

Published Sep 4, 2024 · Updated May 11, 2026

Denial of service in Linux 6.10 allows local users to crash affected PowerMac systems through sufficiently large ATA requests. The pata_macio request-splitting logic can turn each scatter-gather entry into two DMA commands without reserving enough table entries, overflowing the table and triggering a kernel BUG. Reachability requires the pata_macio driver on PowerMac hardware and a max_sectors_kb limit above the 1280 default; triggering the flaw interrupts the system.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux 6.10 allows local users to crash affected PowerMac systems through sufficiently large ATA requests. The pata_macio request-splitting logic can turn each scatter-gather entry into two DMA commands without reserving enough table entries, overflowing the table and triggering a kernel BUG. Reachability requires the pata_macio driver on PowerMac hardware and a max_sectors_kb limit above the 1280 default; triggering the flaw interrupts the system.

The record

CVE
CVE-2024-44976
Published
Sep 4, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 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=09fe2bfa6b83f865126ce3964744863f69a4a030 <709e4c8f78e156ab332297bdd87527ec3da4e2d4
  2. Affected versionversion=09fe2bfa6b83f865126ce3964744863f69a4a030 <822c8020aebcf5804a143b891e34f29873fee5e2
  3. Affected versionversion=6.10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=09fe2bfa6b83f865126ce3964744863f69a4a030 <709e4c8f78e156ab332297bdd87527ec3da4e2d4; version=09fe2bfa6b83f865126ce3964744863f69a4a030 <822c8020aebcf5804a143b891e34f29873fee5e2; version=6.10

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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