CVE-2026-74372

RAID device removal denial via leaked pending reference

Published Aug 15, 2026 · Updated Aug 15, 2026

A reference leak in Linux kernel RAID1 6.13 allows local users to prevent removal of an affected RAID device through an atomic write. raid1_write_request() increments rdev->nr_pending for each mirror, but its REQ_ATOMIC bad-block error branch skips the matching decrement for the current slot. Triggering the flaw requires a RAID1 atomic write to encounter a bad block, and the leaked reference leaves raid1_remove_conf() unable to remove that device.

CVSS severity2.5
Low
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A reference leak in Linux kernel RAID1 6.13 allows local users to prevent removal of an affected RAID device through an atomic write. raid1_write_request() increments rdev->nr_pending for each mirror, but its REQ_ATOMIC bad-block error branch skips the matching decrement for the current slot. Triggering the flaw requires a RAID1 atomic write to encounter a bad block, and the leaked reference leaves raid1_remove_conf() unable to remove that device.

The record

CVE
CVE-2026-74372
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=6.13
  2. Affected versionversion=f2a38abf5f1c5aeb3be8e9f4d3d815c867fff7ca <5ac9e793ba2583d72740d929e7858a6c82e22ed5
  3. Affected versionversion=f2a38abf5f1c5aeb3be8e9f4d3d815c867fff7ca <731485617bf862f1289c3f40ed1f800d0475826f
  4. Affected versionversion=f2a38abf5f1c5aeb3be8e9f4d3d815c867fff7ca <909d9dc3b5730c8ed7b764c68bc788342df2a07b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.13; version=f2a38abf5f1c5aeb3be8e9f4d3d815c867fff7ca <5ac9e793ba2583d72740d929e7858a6c82e22ed5; version=f2a38abf5f1c5aeb3be8e9f4d3d815c867fff7ca <731485617bf862f1289c3f40ed1f800d0475826f; version=f2a38abf5f1c5aeb3be8e9f4d3d815c867fff7ca <909d9dc3b5730c8ed7b764c68bc788342df2a07b

Published CVSS scores

2.5Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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

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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