CVE-2021-47426 bpf, s390: Fix potential memory leak about jit_data
A memory leak in the Linux kernel's s390 BPF JIT compiler allows attackers to cause a denial of service by exhausting system memory.
- 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-2021-47426?
CVE-2021-47426 is a medium-severity memory corruption vulnerability in Linux kernel, published on 21 May 2024. 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:
bpf, s390: Fix potential memory leak about jit_data
Make sure to free jit_data through kfree() in the error path.
Weakness: CWE-401
Which versions are affected by CVE-2021-47426?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47426?
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-2021-47426 being exploited?
There is no known exploitation of CVE-2021-47426 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47426, GHSA-xj33-wwm4-p8mw, UBUNTU-CVE-2021-47426.