CVE-2026-98492Hinoki check available

Memory loss via untracked DMA-buffer cleanup

Published Oct 18, 2026 · Updated Oct 18, 2026

DMA-buffer leaks in the Linux macb driver cause kernel memory loss on allocation-error paths; attacker control is unspecified. macb_alloc() calls macb_free() before recording allocated buffers in bp->queues[0], leaving transmit or receive buffers unreachable by cleanup. The affected driver must encounter a receive allocation failure or a DMA buffer crossing a 4 GiB boundary; no attacker-controlled trigger or resulting crash is documented.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

DMA-buffer leaks in the Linux macb driver cause kernel memory loss on allocation-error paths; attacker control is unspecified. macb_alloc() calls macb_free() before recording allocated buffers in bp->queues[0], leaving transmit or receive buffers unreachable by cleanup. The affected driver must encounter a receive allocation failure or a DMA buffer crossing a 4 GiB boundary; no attacker-controlled trigger or resulting crash is documented.

The record

CVE
CVE-2026-98492
Published
Oct 18, 2026
Updated
Oct 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 18, 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=6.17.3 <6.18
  2. Affected versionversion=6.18
  3. Affected versionversion=78d901897b3cae06b38f54e48a2378cf9da21175 <23d42b9a3bcd55b17d3b371544fedc708c2397e9
  4. Affected versionversion=78d901897b3cae06b38f54e48a2378cf9da21175 <259e6cbb6a097da8ced544ee92a6fbde35aa1338
  5. Affected versionversion=78d901897b3cae06b38f54e48a2378cf9da21175 <bda487567d0b7b15dfa876511085c0666b9efad5
  6. Affected versionversion=982a4d9a2e12b693f684eff943043a607628d871

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.17.3 <6.18; version=6.18; version=78d901897b3cae06b38f54e48a2378cf9da21175 <23d42b9a3bcd55b17d3b371544fedc708c2397e9; version=78d901897b3cae06b38f54e48a2378cf9da21175 <259e6cbb6a097da8ced544ee92a6fbde35aa1338; version=78d901897b3cae06b38f54e48a2378cf9da21175 <bda487567d0b7b15dfa876511085c0666b9efad5; version=982a4d9a2e12b693f684eff943043a607628d871

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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