CVE-2026-68410 wifi: libertas: fix memory leak in helper_firmware_cb()
A memory leak in the Linux kernel Libertas Wi-Fi driver allows attackers to cause denial of service via repeated firmware loading.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68410?
CVE-2026-68410 is a memory corruption vulnerability in Linux, published on 10 Aug 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:
wifi: libertas: fix memory leak in helper_firmware_cb()
helper_firmware_cb() neglects to free the single-stage firmware image after a successful async load, leading to a memory leak in the USB firmware-download path.
Fix this memory leak by calling release_firmware() immediately after lbs_fw_loaded() returns.
The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in the current wireless tree.
An x86_64 allyesconfig build showed no new warnings. As we do not have compatible Libertas USB hardware for exercising this firmware-download path, no runtime testing was able to be performed.
Which versions are affected by CVE-2026-68410?
How do I fix CVE-2026-68410?
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-2026-68410 being exploited?
There is no known exploitation of CVE-2026-68410 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68410, DEBIAN-CVE-2026-68410, GHSA-wjgw-rwg6-p893, UBUNTU-CVE-2026-68410.