CVE-2026-74379

System crash via NULL resource cleanup

Published Aug 15, 2026 · Updated Aug 15, 2026

NULL-pointer dereference in the Linux kernel dax/kmem driver allows local users to crash the system during DAX memory removal. A partially successful dev_dax_kmem_probe leaves failed ranges with NULL resources, but dev_dax_kmem_remove later iterates every range and cleans up the nonexistent resource. Exploitation requires local access and a discontiguous DAX device whose later range fails memory-region reservation or addition; triggering removal crashes the kernel.

CVSS severity5.5
Medium
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

NULL-pointer dereference in the Linux kernel dax/kmem driver allows local users to crash the system during DAX memory removal. A partially successful dev_dax_kmem_probe leaves failed ranges with NULL resources, but dev_dax_kmem_remove later iterates every range and cleans up the nonexistent resource. Exploitation requires local access and a discontiguous DAX device whose later range fails memory-region reservation or addition; triggering removal crashes the kernel.

The record

CVE
CVE-2026-74379
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
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=5.10
  2. Affected versionversion=60e93dc097f7f13a16a7e4b75b8803eb2adbb721 <30ea97affbcce236c57287c82dc6ef7a29c63b76
  3. Affected versionversion=60e93dc097f7f13a16a7e4b75b8803eb2adbb721 <598ed7393a639c7547b28ff3e14db9f1ac37c132
  4. Affected versionversion=60e93dc097f7f13a16a7e4b75b8803eb2adbb721 <5d3139abb9d1671fa5e42c3d6d8cb3b05479c5bb
  5. Affected versionversion=60e93dc097f7f13a16a7e4b75b8803eb2adbb721 <799e54c510a03a65a57627018a817838d72f35bd
  6. Affected versionversion=60e93dc097f7f13a16a7e4b75b8803eb2adbb721 <8aa442cfce79e2d69e72fc8e0c0864ac2971149d
  7. Affected versionversion=60e93dc097f7f13a16a7e4b75b8803eb2adbb721 <d47b0b8a69a13e06afafa54723f3e8c99b0c788f
  8. Affected versionversion=60e93dc097f7f13a16a7e4b75b8803eb2adbb721 <ef4fc53898bd6c4d0119cc6d419ebef7f2560f31

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.10; version=60e93dc097f7f13a16a7e4b75b8803eb2adbb721 <30ea97affbcce236c57287c82dc6ef7a29c63b76; version=60e93dc097f7f13a16a7e4b75b8803eb2adbb721 <598ed7393a639c7547b28ff3e14db9f1ac37c132; version=60e93dc097f7f13a16a7e4b75b8803eb2adbb721 <5d3139abb9d1671fa5e42c3d6d8cb3b05479c5bb; version=60e93dc097f7f13a16a7e4b75b8803eb2adbb721 <799e54c510a03a65a57627018a817838d72f35bd; version=60e93dc097f7f13a16a7e4b75b8803eb2adbb721 <8aa442cfce79e2d69e72fc8e0c0864ac2971149d; version=60e93dc097f7f13a16a7e4b75b8803eb2adbb721 <d47b0b8a69a13e06afafa54723f3e8c99b0c788f; version=60e93dc097f7f13a16a7e4b75b8803eb2adbb721 <ef4fc53898bd6c4d0119cc6d419ebef7f2560f31

Published CVSS scores

5.5Red HatCVSS: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-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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