CVE-2025-38042

Descriptor-pool cleanup failure via incorrect FDQ reset

Published Jun 18, 2025 · Updated May 11, 2026

Availability flaw in the Linux kernel 5.6 through 6.14.8 allows local users to trigger DMA descriptor-pool cleanup failure during driver removal. The k3_udma_glue_reset_rx_chn function trusts a caller-supplied skip_fdq value instead of deriving the DMA architecture, so it clears the wrong receive free-descriptor queues. Reachability requires TI AM62-SK hardware using ti_am65_cpsw_nuss, receive-channel reconfiguration, and privileged driver removal; the observed result is a kernel warning and incomplete descriptor-pool cleanup.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Availability flaw in the Linux kernel 5.6 through 6.14.8 allows local users to trigger DMA descriptor-pool cleanup failure during driver removal. The k3_udma_glue_reset_rx_chn function trusts a caller-supplied skip_fdq value instead of deriving the DMA architecture, so it clears the wrong receive free-descriptor queues. Reachability requires TI AM62-SK hardware using ti_am65_cpsw_nuss, receive-channel reconfiguration, and privileged driver removal; the observed result is a kernel warning and incomplete descriptor-pool cleanup.

The record

CVE
CVE-2025-38042
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE 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=5.6
  2. Affected versionversion=d702419134133db1eab2067dc6ea5723467fd917 <0da30874729baeb01889b0eca16cfda122687503
  3. Affected versionversion=d702419134133db1eab2067dc6ea5723467fd917 <d0dd9d133ef8fdc894e0be9aa27dc49ef5f813cb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.6; version=d702419134133db1eab2067dc6ea5723467fd917 <0da30874729baeb01889b0eca16cfda122687503; version=d702419134133db1eab2067dc6ea5723467fd917 <d0dd9d133ef8fdc894e0be9aa27dc49ef5f813cb

Published CVSS scores

5.5UbuntuCVSS: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.

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

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

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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