Race Condition Affecting kernel-rt-64k-modules-core package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.13% (3rd percentile)

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  • Snyk IDSNYK-RHEL10-KERNELRT64KMODULESCORE-18878768
  • published18 Aug 2026
  • disclosed15 Aug 2026

Introduced: 15 Aug 2026

NewCVE-2026-74511  (opens in a new tab)
CWE-366  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 kernel-rt-64k-modules-core.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-64k-modules-core package and not the kernel-rt-64k-modules-core package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: mgmt: fix pending command UAF in EIR updates

MGMT_OP_SET_LOCAL_NAME is handled asynchronously on powered controllers and can run set_name_sync(). When the controller is BR/EDR capable, set_name_sync() updates the local name and then rebuilds EIR data through eir_create(). The EIR builder walks hdev->uuids, but the UUID list can be changed and entries can be freed by MGMT_OP_ADD_UUID and MGMT_OP_REMOVE_UUID.

pending_eir_or_class() is meant to serialize management commands that can change EIR or the class of device, but it did not include MGMT_OP_SET_LOCAL_NAME. In addition, it walked hdev->mgmt_pending without hdev->mgmt_pending_lock even though pending commands are added and removed under that mutex. A racing command completion can therefore remove and free a pending command while pending_eir_or_class() is still inspecting it, leading to a use-after-free in the pending-command list or allowing a local name update to rebuild EIR while UUID entries are being removed.

Take hdev->mgmt_pending_lock while scanning hdev->mgmt_pending and treat MGMT_OP_SET_LOCAL_NAME as an EIR/class-affecting pending command on the powered asynchronous path. Check for a conflicting pending command before copying the new short name so a rejected SET_LOCAL_NAME request does not modify hdev->short_name.

CVSS Base Scores

version 3.1