Bug 2436832 (CVE-2026-23081)

Summary: CVE-2026-23081 kernel: Linux kernel: Denial of Service in intel-xway PHY driver due to OF node reference count leakage
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the Linux kernel's intel-xway PHY (Physical Layer) driver. This vulnerability involves an improper management of Open Firmware (OF) node reference counts. A local attacker could exploit this by repeatedly triggering a specific condition, leading to resource exhaustion and ultimately a denial of service (DoS) on the system.
 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 2026-02-04 17:05:37 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: phy: intel-xway: fix OF node refcount leakage

Automated review spotted am OF node reference count leakage when
checking if the 'leds' child node exists.

Call of_put_node() to correctly maintain the refcount.
Comment 1 Jon Moroney 2026-02-04 19:05:02 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026020421-CVE-2026-23081-5494@gregkh/T