Race condition in Linux kernel - CVE-2026-74365

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Main Vulnerability Database Vulnerabilities #VU142788

Race condition in Linux kernel - CVE-2026-74365

Published: August 15, 2026


Vulnerability identifier: #VU142788
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-74365
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to cause silent data corruption.

The vulnerability exists due to a race condition in BTT lane acquisition in the Linux kernel nvdimm BTT subsystem when handling BTT I/O. A local user can trigger concurrent use of the same lane to cause silent data corruption.

The issue occurs because BTT lanes became preemptible while the recursion model still relied on a per-CPU recursion count, allowing another task on the same CPU to bypass locking and use the same lane concurrently.


Affected software

Linux kernel
Ubuntu
linux-gcp-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)

How to mitigate CVE-2026-74365

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-gcp-7.0 (Ubuntu package) - addressed in versions 7.0.0-38.38~24.04.4, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14~24.04.1
linux-azure-7.0 (Ubuntu package) - addressed in versions 7.0.0-1016.16~24.04.1, 7.0.0-1017.17~24.04.1

External References

Related Security Bulletins