CVE-2021-47609 firmware: arm_scpi: Fix string overflow in SCPI genpd driver
A buffer overflow in the Linux kernel SCPI driver allows attackers to cause denial of service or execute arbitrary code via crafted device tree data.
- 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-2021-47609?
CVE-2021-47609 is a high-severity memory corruption vulnerability in Linux kernel, published on 19 Jun 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:
firmware: arm_scpi: Fix string overflow in SCPI genpd driver
Without the bound checks for scpi_pd->name, it could result in the buffer overflow when copying the SCPI device name from the corresponding device tree node as the name string is set at maximum size of 30.
Let us fix it by using devm_kasprintf so that the string buffer is allocated dynamically.
Weakness: CWE-120
Which versions are affected by CVE-2021-47609?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47609?
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-2021-47609 being exploited?
There is no known exploitation of CVE-2021-47609 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47609, GHSA-75vg-83r4-pmmq, UBUNTU-CVE-2021-47609.