CVE-2026-68473 powerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()
Incorrect configuration check in Linux kernel powerpc uaccess code prevents proper address masking on E500 hardware.
- 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-2026-68473?
CVE-2026-68473 is a high-severity vulnerability in Linux, published on 15 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:
powerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()
mask_user_address() incorrectly checks for CONFIG_E500 instead of CONFIG_PPC_E500, causing mask_user_address_isel() to not be used on E500 hardware. Fix the check to use the correct name.
Which versions are affected by CVE-2026-68473?
How do I fix CVE-2026-68473?
Apply the vendor's patch.
Is CVE-2026-68473 being exploited?
There is no known exploitation of CVE-2026-68473 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-68473, GHSA-h544-cjrp-f5fc, UBUNTU-CVE-2026-68473.