CVE-2024-46716

Local kernel crash via linked descriptor reuse

Published Sep 18, 2024 · Updated Aug 5, 2026

Use-after-free in the Altera mSGDMA driver in Linux allows local users to crash affected systems during DMA channel cleanup. The msgdma_free_descriptor function appends descriptors to the free list without first unlinking them, while cleanup removes only the first node, leaving later freed descriptors linked and reusable. Reachability requires an Altera mSGDMA-backed device and local low-privileged access able to release DMA channel resources; the published impact is a kernel crash, with no confidentiality or integrity loss.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Altera mSGDMA driver in Linux allows local users to crash affected systems during DMA channel cleanup. The msgdma_free_descriptor function appends descriptors to the free list without first unlinking them, while cleanup removes only the first node, leaving later freed descriptors linked and reusable. Reachability requires an Altera mSGDMA-backed device and local low-privileged access able to release DMA channel resources; the published impact is a kernel crash, with no confidentiality or integrity loss.

The record

CVE
CVE-2024-46716
Published
Sep 18, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=4.14
  2. Affected versionversion=a85c6f1b2921cbd2f54666a52804f407c4a064fe <20bf2920a869f9dbda0ef8c94c87d1901a64a716
  3. Affected versionversion=a85c6f1b2921cbd2f54666a52804f407c4a064fe <54e4ada1a4206f878e345ae01cf37347d803d1b1
  4. Affected versionversion=a85c6f1b2921cbd2f54666a52804f407c4a064fe <a3480e59fdbe5585d2d1eff0bed7671583acf725
  5. Affected versionversion=a85c6f1b2921cbd2f54666a52804f407c4a064fe <db67686676c7becc1910bf1d6d51505876821863

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.14; version=a85c6f1b2921cbd2f54666a52804f407c4a064fe <20bf2920a869f9dbda0ef8c94c87d1901a64a716; version=a85c6f1b2921cbd2f54666a52804f407c4a064fe <54e4ada1a4206f878e345ae01cf37347d803d1b1; version=a85c6f1b2921cbd2f54666a52804f407c4a064fe <a3480e59fdbe5585d2d1eff0bed7671583acf725; version=a85c6f1b2921cbd2f54666a52804f407c4a064fe <db67686676c7becc1910bf1d6d51505876821863

Published CVSS scores

5.5National Vulnerability DatabaseCVSS: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

CWE-416Use After Free
T1499.004Application or System Exploitation

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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