CVE-2026-46327

Unspecified local impact via unlocked suspension check

Published Jun 9, 2026 · Updated Jun 9, 2026

Race condition in Linux Kernel Device Mapper allows local users to cause unspecified impact via zone reporting during suspension. The dm_blk_report_zones function calls dm_suspended_md before acquiring the live table lock, so suspension can occur between the check and table acquisition. Reachability requires local low-privileged access, CONFIG_BLK_DEV_ZONED, a zoned Device Mapper device, and winning the race; kernel.org does not identify the resulting failure mode.

CVSS severity7.8
High
EPSS probability0.12%
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 Linux Kernel Device Mapper allows local users to cause unspecified impact via zone reporting during suspension. The dm_blk_report_zones function calls dm_suspended_md before acquiring the live table lock, so suspension can occur between the check and table acquisition. Reachability requires local low-privileged access, CONFIG_BLK_DEV_ZONED, a zoned Device Mapper device, and winning the race; kernel.org does not identify the resulting failure mode.

The record

CVE
CVE-2026-46327
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 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=37f53a2c60d03743e0eacf7a0c01c279776fef4e <24c405fdbe215c45e57bba672cc42859038491ee
  2. Affected versionversion=37f53a2c60d03743e0eacf7a0c01c279776fef4e <7a3385e97af2b6f485fef11e82d8c29adee4be93
  3. Affected versionversion=37f53a2c60d03743e0eacf7a0c01c279776fef4e <d809a36692ee1394cac85ce6ba7cf8ea58da5812
  4. Affected versionversion=6.12.34 <6.12.75
  5. Affected versionversion=6.15.3 <6.16
  6. Affected versionversion=6.16
  7. Affected versionversion=d19bc1b4dd5f322980b1f05f79b2ea4f0db10920
  8. Affected versionversion=f9c1bdf24615303d48a2d0fd629c88f3189563aa <175ac0a6115400278d3900f5a04a58b17b3f6cd0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=37f53a2c60d03743e0eacf7a0c01c279776fef4e <24c405fdbe215c45e57bba672cc42859038491ee; version=37f53a2c60d03743e0eacf7a0c01c279776fef4e <7a3385e97af2b6f485fef11e82d8c29adee4be93; version=37f53a2c60d03743e0eacf7a0c01c279776fef4e <d809a36692ee1394cac85ce6ba7cf8ea58da5812; version=6.12.34 <6.12.75; version=6.15.3 <6.16; version=6.16; version=d19bc1b4dd5f322980b1f05f79b2ea4f0db10920; version=f9c1bdf24615303d48a2d0fd629c88f3189563aa <175ac0a6115400278d3900f5a04a58b17b3f6cd0

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
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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