CVE-2026-93109
RDMA/mlx5: Drain RCU callbacks during module teardown
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Drain RCU callbacks during module teardown devx_free_subscription() can remain queued after the last DevX event file drops its module reference or an auxiliary driver detaches its devices. mlx5_ib can then unload before the callback runs. Registration error unwind has the same risk because driver registration can attach existing devices before failing. Wait after all drivers have stopped.
INFO
Published Date :
Sept. 17, 2026, 5:18 p.m.
Last Modified :
Sept. 17, 2026, 5:18 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Ensure RCU callbacks drain before module unload.
- Wait for drivers to stop before registration.
- Review module reference counting.
- Test auxiliary driver detachment scenarios.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-93109.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-93109 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-93109
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-93109 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-93109 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 17, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Drain RCU callbacks during module teardown devx_free_subscription() can remain queued after the last DevX event file drops its module reference or an auxiliary driver detaches its devices. mlx5_ib can then unload before the callback runs. Registration error unwind has the same risk because driver registration can attach existing devices before failing. Wait after all drivers have stopped. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/93xxx/CVE-2026-93109.json">CVE-2026-93109</a> Added Reference https://git.kernel.org/stable/c/2f946e7839f677fa14574b6babad14b37ae0bbbe Added Reference https://git.kernel.org/stable/c/4664368b9bd9d5d79ebad24056b98c34b9fed20f Added Reference https://git.kernel.org/stable/c/4be7810ba70291abb2f68cc6db0ae1b93ee9c76a Added Reference https://git.kernel.org/stable/c/59d60e04afd012f07e996d2e34cb90a4ec6f5cff Added Reference https://git.kernel.org/stable/c/7babc25d8dd5b7642920fbc0737cfd1469e7025b Added Reference https://git.kernel.org/stable/c/ca428e597f12b278bf158356e34641e6386cfa82 Added Reference https://git.kernel.org/stable/c/e37cdd75f8d61c1123d324ae5667ac3da562290e