CVE-2025-39893

Service interruption via stale ECC engine registration

Published Oct 1, 2025 · Updated May 11, 2026

Use-after-free in Linux kernel 6.15 through 6.16.5 and 6.17 release candidates allows local users to interrupt service. The QPIC NAND driver's probe-error and removal paths omit ECC-engine unregistration, leaving a registered object after its backing device state is freed. Reachability requires the affected driver and a controller-registration failure or device removal, after which later ECC-engine access can disrupt the host.

CVSS severity5.5
Medium
EPSS probability0.13%
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 Linux kernel 6.15 through 6.16.5 and 6.17 release candidates allows local users to interrupt service. The QPIC NAND driver's probe-error and removal paths omit ECC-engine unregistration, leaving a registered object after its backing device state is freed. Reachability requires the affected driver and a controller-registration failure or device removal, after which later ECC-engine access can disrupt the host.

The record

CVE
CVE-2025-39893
Published
Oct 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 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=6.15
  2. Affected versionversion=7304d1909080ef0c9da703500a97f46c98393fcd <1991a458528588ff34e98b6365362560d208710f
  3. Affected versionversion=7304d1909080ef0c9da703500a97f46c98393fcd <e4de48e66af17547727bb2e4b1867952817edff7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.15; version=7304d1909080ef0c9da703500a97f46c98393fcd <1991a458528588ff34e98b6365362560d208710f; version=7304d1909080ef0c9da703500a97f46c98393fcd <e4de48e66af17547727bb2e4b1867952817edff7

Published CVSS scores

5.5CISA-ADPCVSS: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-401Missing Release of Memory after Effective Lifetime

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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