CVE-2026-43275

System crash via unflushed UFS exception work

Published May 6, 2026 · Updated May 6, 2026

Race condition in the Linux Kernel UFS core allows local users to crash the system during suspend at RPM level zero. The UFS core skips flushing pending exception-event work when UFS_PM_LVL_0 keeps the device and link active, so that work can access the host controller after deep power-down begins. Reachability requires local low-privileged access, a UFS device configured for UFS_PM_LVL_0, and a pending exception task overlapping deep suspend; the consequence is a system crash.

CVSS severity4.7
Medium
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux Kernel UFS core allows local users to crash the system during suspend at RPM level zero. The UFS core skips flushing pending exception-event work when UFS_PM_LVL_0 keeps the device and link active, so that work can access the host controller after deep power-down begins. Reachability requires local low-privileged access, a UFS device configured for UFS_PM_LVL_0, and a pending exception task overlapping deep suspend; the consequence is a system crash.

The record

CVE
CVE-2026-43275
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-362, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=3.18
  2. Affected versionversion=57d104c153d3d6d7bea60089e80f37501851ed2c <5d186731bc335cc049d4e57ab9f563cfab95593e
  3. Affected versionversion=57d104c153d3d6d7bea60089e80f37501851ed2c <78d8e2d6352e8317686ee3a44811ac14c415a57d
  4. Affected versionversion=57d104c153d3d6d7bea60089e80f37501851ed2c <aa8d68d97c7f0ef966e51afc17fdbdc372700edf
  5. Affected versionversion=57d104c153d3d6d7bea60089e80f37501851ed2c <aac2fee7513dd25042a616f86a1469b4858d2c5c
  6. Affected versionversion=57d104c153d3d6d7bea60089e80f37501851ed2c <ab71c146c135f9af1614ef0fc29a0a3b84f1a373
  7. Affected versionversion=57d104c153d3d6d7bea60089e80f37501851ed2c <d5c3a1a13f97355c397f9439d79cb04b182958a3
  8. Affected versionversion=57d104c153d3d6d7bea60089e80f37501851ed2c <f8ef441811ec413717f188f63d99182f30f0f08e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.18; version=57d104c153d3d6d7bea60089e80f37501851ed2c <5d186731bc335cc049d4e57ab9f563cfab95593e; version=57d104c153d3d6d7bea60089e80f37501851ed2c <78d8e2d6352e8317686ee3a44811ac14c415a57d; version=57d104c153d3d6d7bea60089e80f37501851ed2c <aa8d68d97c7f0ef966e51afc17fdbdc372700edf; version=57d104c153d3d6d7bea60089e80f37501851ed2c <aac2fee7513dd25042a616f86a1469b4858d2c5c; version=57d104c153d3d6d7bea60089e80f37501851ed2c <ab71c146c135f9af1614ef0fc29a0a3b84f1a373; version=57d104c153d3d6d7bea60089e80f37501851ed2c <d5c3a1a13f97355c397f9439d79cb04b182958a3; version=57d104c153d3d6d7bea60089e80f37501851ed2c <f8ef441811ec413717f188f63d99182f30f0f08e

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7Canonical Ubuntu SecurityCVSS:3.1/AV:L/AC:H/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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499Endpoint Denial of Service

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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