CVE-2024-26680

Service interruption via mismatched PTP ring unmapping

Published Apr 2, 2024 · Updated May 11, 2026

Use-after-free in the Linux kernel allows local users to interrupt service through the Atlantic PTP hardware timestamp ring. aq_ring_hwts_rx_alloc() maps 34,816 bytes, but generic aq_ring_free() releases only 32,768 bytes, producing a DMA mapping mismatch during ring cleanup. Exploitation requires local low-privileged access and an Aquantia Atlantic adapter using PTP hardware timestamping; the bounded impact is host service interruption.

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 Linux kernel allows local users to interrupt service through the Atlantic PTP hardware timestamp ring. aq_ring_hwts_rx_alloc() maps 34,816 bytes, but generic aq_ring_free() releases only 32,768 bytes, producing a DMA mapping mismatch during ring cleanup. Exploitation requires local low-privileged access and an Aquantia Atlantic adapter using PTP hardware timestamping; the bounded impact is host service interruption.

The record

CVE
CVE-2024-26680
Published
Apr 2, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 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=5.5
  2. Affected versionversion=94ad94558b0fbf18dd6fb0987540af1693157556 <004fe5b7f59286a926a45e0cafc7870e9cdddd56
  3. Affected versionversion=94ad94558b0fbf18dd6fb0987540af1693157556 <2e7d3b67630dfd8f178c41fa2217aa00e79a5887
  4. Affected versionversion=94ad94558b0fbf18dd6fb0987540af1693157556 <466ceebe48cbba3f4506f165fca7111f9eb8bb12
  5. Affected versionversion=94ad94558b0fbf18dd6fb0987540af1693157556 <e42e334c645575be5432adee224975d4f536fdb1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.5; version=94ad94558b0fbf18dd6fb0987540af1693157556 <004fe5b7f59286a926a45e0cafc7870e9cdddd56; version=94ad94558b0fbf18dd6fb0987540af1693157556 <2e7d3b67630dfd8f178c41fa2217aa00e79a5887; version=94ad94558b0fbf18dd6fb0987540af1693157556 <466ceebe48cbba3f4506f165fca7111f9eb8bb12; version=94ad94558b0fbf18dd6fb0987540af1693157556 <e42e334c645575be5432adee224975d4f536fdb1

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST National 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 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-416Use After Free
T1499.004Application or System Exploitation

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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