CVE-2024-26795 riscv: Sparse-Memory/vmemmap out-of-bounds fix
An out-of-bounds memory access in the RISC-V Linux kernel's vmemmap handling could allow attackers to cause memory corruption or system crashes.
- 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-2024-26795?
CVE-2024-26795 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 4 Apr 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:
riscv: Sparse-Memory/vmemmap out-of-bounds fix
Offset vmemmap so that the first page of vmemmap will be mapped to the first page of physical memory in order to ensure that vmemmap’s bounds will be respected during pfn_to_page()/page_to_pfn() operations. The conversion macros will produce correct SV39/48/57 addresses for every possible/valid DRAM_BASE inside the physical memory limits.
v2:Address Alex's comments
Which versions are affected by CVE-2024-26795?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2024-26795?
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-2024-26795 being exploited?
There is no known exploitation of CVE-2024-26795 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2024-26795, DEBIAN-CVE-2024-26795, GHSA-f34w-8j75-rh85, UBUNTU-CVE-2024-26795.