CVE-2025-37928Public exploit

Kernel crash via atomic-context scheduling

Published May 20, 2025 · Updated May 11, 2026

Denial of service in Linux kernel dm-bufio allows local users to crash the kernel when tasklet verification is enabled. dm_bufio_lock invokes spin_lock_bh, after which __scan reaches a scheduling path while execution remains in atomic context. The reported trigger requires CONFIG_DEBUG_ATOMIC_SLEEP and try_verify_in_tasklet; the observed consequence is a kernel BUG, Oops, and service interruption.

CVSS severity5.7
Medium
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux kernel dm-bufio allows local users to crash the kernel when tasklet verification is enabled. dm_bufio_lock invokes spin_lock_bh, after which __scan reaches a scheduling path while execution remains in atomic context. The reported trigger requires CONFIG_DEBUG_ATOMIC_SLEEP and try_verify_in_tasklet; the observed consequence is a kernel BUG, Oops, and service interruption.

The record

CVE
CVE-2025-37928
Published
May 20, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 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=4.9
  2. Affected versionversion=7cd326747f46ffe1c7bff5682e97dfbcb98990ec <69a37b3ba85088fc6b903b8e1db7f0a1d4d0b52d
  3. Affected versionversion=7cd326747f46ffe1c7bff5682e97dfbcb98990ec <a3d8f0a7f5e8b193db509c7191fefeed3533fc44
  4. Affected versionversion=7cd326747f46ffe1c7bff5682e97dfbcb98990ec <a99f5bf4f7197009859dbce14c12f8e2ce5a5a69
  5. Affected versionversion=7cd326747f46ffe1c7bff5682e97dfbcb98990ec <c8c83052283bcf2fdd467a33d1d2bd5ba36e935a
  6. Affected versionversion=7cd326747f46ffe1c7bff5682e97dfbcb98990ec <f45108257280e0a1cc951ce254853721b40c0812

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.9; version=7cd326747f46ffe1c7bff5682e97dfbcb98990ec <69a37b3ba85088fc6b903b8e1db7f0a1d4d0b52d; version=7cd326747f46ffe1c7bff5682e97dfbcb98990ec <a3d8f0a7f5e8b193db509c7191fefeed3533fc44; version=7cd326747f46ffe1c7bff5682e97dfbcb98990ec <a99f5bf4f7197009859dbce14c12f8e2ce5a5a69; version=7cd326747f46ffe1c7bff5682e97dfbcb98990ec <c8c83052283bcf2fdd467a33d1d2bd5ba36e935a; version=7cd326747f46ffe1c7bff5682e97dfbcb98990ec <f45108257280e0a1cc951ce254853721b40c0812

Published CVSS scores

5.7UbuntuCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.8UbuntuCVSS: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

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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 exploitPublished

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

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Technologies

Your stack

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Your stack

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