CVE-2026-43241 ntb: ntb_hw_switchtec: Fix array-index-out-of-bounds access
An out-of-bounds array access in the Switchtec NTB driver can cause a kernel crash, requiring specific hardware configuration to exploit.
- 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-2026-43241?
CVE-2026-43241 is a high-severity memory corruption vulnerability in Linux kernel, published on 6 May 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:
ntb: ntb_hw_switchtec: Fix array-index-out-of-bounds access
Number of MW LUTs depends on NTB configuration and can be set to MAX_MWS, This patch protects against invalid index out of bounds access to mw_sizes When invalid access print message to user that configuration is not valid.
Weakness: CWE-125
Which versions are affected by CVE-2026-43241?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43241?
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-2026-43241 being exploited?
There is no known exploitation of CVE-2026-43241 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-43241, DEBIAN-CVE-2026-43241, GHSA-c449-x267-6vp6, ROOT-OS-DEBIAN-11-CVE-2026-43241, ROOT-OS-UBUNTU-2204-CVE-2026-43241, ROOT-OS-UBUNTU-2404-CVE-2026-43241 and 1 more.