CVE-2026-80874 arm64: dts: renesas: ironhide: Describe inline ECC carveouts
Improper memory reservation for inline ECC carveouts in the Linux kernel can lead to system instability and denial of service under high DRAM utilization.
- 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-2026-80874?
CVE-2026-80874 is a memory corruption vulnerability in Linux, published on 4 Sep 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:
arm64: dts: renesas: ironhide: Describe inline ECC carveouts
The DBSC5 DRAM controller protects DRAM content using inline ECC. The inline ECC utilizes areas of DRAM for its operation, which are in the DRAM address range, but must not be accessed or modified. Describe the inline ECC carveout areas used by the DBSC5 controller on this hardware as reserved-memory, which must not be accessed. Include DRAM areas which are unprotected by ECC as well, those are parts of the DRAM which directly precede the ECC carveout.
In case of high DRAM utilization, unless the inline ECC carveouts are properly reserved, Linux may use and corrupt the memory used by the DBSC5 DRAM controller for inline ECC, which would lead to the system becoming unstable.
Which versions are affected by CVE-2026-80874?
How do I fix CVE-2026-80874?
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-2026-80874 being exploited?
There is no known exploitation of CVE-2026-80874 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-80874, GHSA-c596-8cgj-hv56, UBUNTU-CVE-2026-80874.