Bug 2482609 (CVE-2026-46134)

Summary: CVE-2026-46134 kernel: platform/chrome: cros_ec_typec: Init mutex in Thunderbolt registration
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the Linux kernel's `cros_ec_typec` component. This vulnerability occurs because a mutex, a mechanism used to prevent simultaneous access to shared resources, was not properly initialized during Thunderbolt registration. This oversight can lead to a NULL dereference, potentially causing system instability or a denial of service (DoS) for affected systems.
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-28 11:05:39 UTC 
In the Linux kernel, the following vulnerability has been resolved:

platform/chrome: cros_ec_typec: Init mutex in Thunderbolt registration

cros_typec_register_thunderbolt() missed initializing the `adata->lock`
mutex.  This leads to a NULL dereference when the mutex is later
acquired (e.g. in cros_typec_altmode_work()).

Initialize the mutex in cros_typec_register_thunderbolt() to fix the
issue.
Comment 1 Keith Grant 2026-05-28 17:21:05 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052818-CVE-2026-46134-0666@gregkh/T