CVE-2026-43148 powerpc/smp: Add check for kcalloc() failure in parse_thread_groups()
A missing check for memory allocation failure in the Linux kernel's PowerPC SMP code can lead to a null pointer dereference and system crash.
- 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-2026-43148?
CVE-2026-43148 is a medium-severity 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:
powerpc/smp: Add check for kcalloc() failure in parse_thread_groups()
As kcalloc() may fail, check its return value to avoid a NULL pointer dereference when passing it to of_property_read_u32_array().
Weakness: CWE-476
Which versions are affected by CVE-2026-43148?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43148?
Apply the vendor's patch.
Is CVE-2026-43148 being exploited?
There is no known exploitation of CVE-2026-43148 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-43148, DEBIAN-CVE-2026-43148, GHSA-7xgq-2f8h-fvh6, ROOT-OS-UBUNTU-2204-CVE-2026-43148, ROOT-OS-UBUNTU-2404-CVE-2026-43148, UBUNTU-CVE-2026-43148.