# CVE-2026-93265: PCI/pwrctrl: tc9563: Fix parsing the integrated Ethernet MAC Endpoint node

> A Linux kernel driver flaw allows out-of-bounds memory access, potentially leading to code execution or system crashes.

- **Severity:** High 7.7 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 24 Sep 2026
- **Updated:** 19 Oct 2026
- **Also known as:** DEBIAN-CVE-2026-93265, GHSA-269q-3q6g-mmg8, UBUNTU-CVE-2026-93265

## What is CVE-2026-93265?

CVE-2026-93265 is a high-severity memory corruption vulnerability in Linux, published on 24 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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 tc9563_pwrctrl->cfg array.

## Which versions are affected by CVE-2026-93265?


## How do I fix CVE-2026-93265?

Apply the vendor's patch.

## Is CVE-2026-93265 being exploited?

There is no known exploitation of CVE-2026-93265 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-93265 and fix it if it is affected.

What it is: CVE-2026-93265 is a high-severity memory corruption vulnerability in Linux, published on 24 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-93265 in the wild and no public exploit code.

Affected product: Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-93265/ (Markdown: https://insights.sbomify.com/CVE-2026-93265/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-93265
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-93265
- OSV: https://osv.dev/vulnerability/CVE-2026-93265

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-93265/
Summaries are generated and may contain mistakes; the official description above is the record.