CVE-2026-93265: PCI/pwrctrl: tc9563: Fix parsing the integrated Ethernet MAC Endpoint node
In the Linux kernel, the following vulnerability has been resolved:
PCI/pwrctrl: tc9563: Fix parsing the integrated Ethernet MAC Endpoint node
DSP3 has an integrated Ethernet MAC Endpoint which has its own set of config registers for configuring settings such as ASPM. The Endpoint device has two physical functions and those two functions share the same settings.
Parse the Endpoint node under DSP3 instead of parsing both functions. The existing parsing logic also has one OOB issue as parsing both functions will result in accessing past the tc9563pwrctrl->cfg array.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Compensating control
Update the tc9563 PCI/pwrctrl parsing logic to parse the integrated Ethernet MAC Endpoint node under DSP3 only, rather than parsing both physical functions, to avoid accessing past the tc9563_pwrctrl->cfg array.
Event History
Frequently Asked Questions
Which systems are exposed to this issue?
Systems using the Linux kernel tc9563 PCI power-control support for DSP3's integrated Ethernet MAC Endpoint are affected. The issue occurs because the Endpoint has two physical functions that share configuration settings, but the prior logic parsed both functions.
What condition triggers the out-of-bounds access?
The out-of-bounds access can occur when the existing logic parses both physical functions of the integrated Ethernet MAC Endpoint. Parsing both functions causes access past the tc9563_pwrctrl->cfg array.
What is the relevant remediation?
Use a kernel version containing the fix that parses the Endpoint node under DSP3 rather than parsing both physical functions. The provided stable references identify commits containing the correction.