Bug 2525376 (CVE-2026-80694)

Summary: CVE-2026-80694 kernel: net: ethernet: mtk_eth_soc: pass eth to mtk_handle_irq_rx in poll_controller
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 `mtk_eth_soc` Ethernet driver. The `mtk_poll_controller` function incorrectly passed a `net_device` pointer instead of an `mtk_eth` structure to `mtk_handle_irq_rx`. This incorrect parameter passing can lead to a system crash when `ndo_poll_controller` is called with `CONFIG_NET_POLL_CONTROLLER` enabled, resulting in 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 07:41:48 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: ethernet: mtk_eth_soc: pass eth to mtk_handle_irq_rx in poll_controller

mtk_handle_irq_rx expects a struct mtk_eth * (matching the request_irq
cookie), but mtk_poll_controller incorrectly passed the net_device *.
Calling ndo_poll_controller with CONFIG_NET_POLL_CONTROLLER enabled
would then crash.
Comment 1 gkamathe 2026-08-31 07:27:07 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026082804-CVE-2026-80694-a162@gregkh/T