CVE-2026-74365

Silent data corruption via BTT lane race

Published Aug 15, 2026 · Updated Aug 15, 2026

Race condition in affected Linux kernel BTT versions allows local users to corrupt persistent-memory data during concurrent writes. The per-CPU recursion count can remain nonzero after preemption, letting another task on that CPU bypass the spinlock and reuse the same lane concurrently. Reachability requires local low-privileged access to a BTT-backed NVDIMM namespace and concurrent BTT writes; no disclosure impact is documented.

CVSS severity7.3
High
EPSS probability0.13%
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 affected Linux kernel BTT versions allows local users to corrupt persistent-memory data during concurrent writes. The per-CPU recursion count can remain nonzero after preemption, letting another task on that CPU bypass the spinlock and reuse the same lane concurrently. Reachability requires local low-privileged access to a BTT-backed NVDIMM namespace and concurrent BTT writes; no disclosure impact is documented.

The record

CVE
CVE-2026-74365
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-366, T1485
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=2577fece583c7c05cda7ad50dde7638c962665e1
  2. Affected versionversion=36c75ce3bd299878fd9b238e9803d3817ddafbf3 <417918783bcfe0be135019df16a267b3af442efd
  3. Affected versionversion=36c75ce3bd299878fd9b238e9803d3817ddafbf3 <4eafa810b042d985ec6bbf5b514414e73cee6f6f
  4. Affected versionversion=36c75ce3bd299878fd9b238e9803d3817ddafbf3 <5c53406098b599c420b031e6ec5ba8a2f3794c50
  5. Affected versionversion=36c75ce3bd299878fd9b238e9803d3817ddafbf3 <8d4b989d9c9afe5f185aa5853b666fc4617afe9e
  6. Affected versionversion=40ba3fa21250e361bdd8f00800b3e2cb6160de95
  7. Affected versionversion=4.19.299 <4.20
  8. Affected versionversion=5.10.201 <5.11
  9. Affected versionversion=5.15.139 <5.16
  10. Affected versionversion=5.4.261 <5.5
  11. Affected versionversion=6.1.63 <6.1.178
  12. Affected versionversion=6.5.12 <6.6
  13. Affected versionversion=6.6.2 <6.6.145
  14. Affected versionversion=66eb7b7f23dd9aec5356e7054dd3596ae7648ff5
  15. Affected versionversion=6.7
  16. Affected versionversion=6f50b414f1a0d790f11a6438a3ad6d0577eb2c18 <73e35c1bdfa160b41fdbe204e02325f0687de506
  17. Affected versionversion=b0e7a935739f33ed2bd6868b89f97dd4c2683c26
  18. Affected versionversion=b27751fb1f271bbb78d5993c0b10011628e40e18
  19. Affected versionversion=f23859748e3d530217b197e146a9ac84faf0a282 <fd7a97b2514cfc4b4cc067a27dd39bde2a8b1735

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2577fece583c7c05cda7ad50dde7638c962665e1; version=36c75ce3bd299878fd9b238e9803d3817ddafbf3 <417918783bcfe0be135019df16a267b3af442efd; version=36c75ce3bd299878fd9b238e9803d3817ddafbf3 <4eafa810b042d985ec6bbf5b514414e73cee6f6f; version=36c75ce3bd299878fd9b238e9803d3817ddafbf3 <5c53406098b599c420b031e6ec5ba8a2f3794c50; version=36c75ce3bd299878fd9b238e9803d3817ddafbf3 <8d4b989d9c9afe5f185aa5853b666fc4617afe9e; version=40ba3fa21250e361bdd8f00800b3e2cb6160de95; version=4.19.299 <4.20; version=5.10.201 <5.11; version=5.15.139 <5.16; version=5.4.261 <5.5; version=6.1.63 <6.1.178; version=6.5.12 <6.6; version=6.6.2 <6.6.145; version=66eb7b7f23dd9aec5356e7054dd3596ae7648ff5; version=6.7; version=6f50b414f1a0d790f11a6438a3ad6d0577eb2c18 <73e35c1bdfa160b41fdbe204e02325f0687de506; version=b0e7a935739f33ed2bd6868b89f97dd4c2683c26; version=b27751fb1f271bbb78d5993c0b10011628e40e18; version=f23859748e3d530217b197e146a9ac84faf0a282 <fd7a97b2514cfc4b4cc067a27dd39bde2a8b1735

Published CVSS scores

7.3CVE.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
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

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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-366Race Condition within a Thread
T1485Data Destruction

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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