CVE-2026-64209 phy: qcom: qmp-usbc: Fix out-of-bounds array access in dp swing config
An out-of-bounds array access in the Qualcomm USB-C PHY driver allows attackers to cause memory corruption, potentially leading to code execution or system crashes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-64209?
CVE-2026-64209 is a high-severity memory corruption vulnerability in Linux kernel, published on 24 Jul 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:
phy: qcom: qmp-usbc: Fix out-of-bounds array access in dp swing config
swing_tbl and pre_emphasis_tbl are 4x4 arrays (valid indices 0-3), but the boundary check uses "> 4" instead of ">= 4", allowing index 4 to cause an out-of-bounds access.
Weakness: CWE-125
Which versions are affected by CVE-2026-64209?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-64209?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-64209 being exploited?
There is no known exploitation of CVE-2026-64209 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2026-64209, GHSA-2j9g-74p9-mq3f, ROOT-OS-UBUNTU-2204-CVE-2026-64209, UBUNTU-CVE-2026-64209.