Bug 2525487 (CVE-2026-80596)

Summary: CVE-2026-80596 kernel: Input: ims-pcu - only expose sysfs attributes on control interface
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: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's ims-pcu driver. This vulnerability occurs because sysfs attributes, intended only for the control interface, are improperly exposed on all interfaces. A local user could exploit this by accessing these attributes on data interfaces, leading to unexpected system behavior or crashes.
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Description OSIDB Bzimport 2026-08-28 07:47:31 UTC 
In the Linux kernel, the following vulnerability has been resolved:

Input: ims-pcu - only expose sysfs attributes on control interface

When the driver was converted to use the driver core to instantiate device
attributes (via .dev_groups in the usb_driver structure), the attributes
started appearing on all interfaces bound to the driver. Since the ims-pcu
driver manually claims the secondary data interface during probe, the
driver core automatically creates the sysfs attributes for that interface
as well.

However, the driver only supports these attributes on the primary control
interface. Data interfaces lack the necessary descriptors and internal
state to handle these requests, and accessing them can lead to unexpected
behavior or crashes.

Fix this by updating the is_visible() callbacks for both the main and OFN
attribute groups to verify that the interface being accessed is indeed the
control interface.
Comment 1 gkamathe 2026-08-31 15:25:29 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026082830-CVE-2026-80596-a0f9@gregkh/T