Bug 2525385 (CVE-2026-80655)

Summary: CVE-2026-80655 kernel: soc: xilinx: Fix race condition in event registration
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
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the Linux kernel's `zynqmp_power` driver. A race condition during event registration could allow a local attacker to trigger a system crash. This occurs because certain work structures are registered before they are properly allocated and initialized. If firmware triggers an event in this specific window, a null pointer dereference occurs, leading to a Denial of Service (DoS).
 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 2026-08-28 07:42:17 UTC 
In the Linux kernel, the following vulnerability has been resolved:

soc: xilinx: Fix race condition in event registration

The zynqmp_power driver registers handlers for suspend and subsystem
restart events using register_event(). However, the work structures
(zynqmp_pm_init_suspend_work and zynqmp_pm_init_restart_work) used by
these handlers were allocated and initialized after the registration
call.

This created a race window where, if the firmware triggered an event
immediately after registration but before allocation, the callback
(suspend_event_callback or subsystem_restart_event_callback) would
dereference a NULL pointer in work_pending(), leading to a crash.

Fix this by allocating and initializing the work structures before
registering the events.
Comment 1 gkamathe 2026-08-31 08:20:17 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026082844-CVE-2026-80655-c437@gregkh/T