CVE-2025-68737 arm64/pageattr: Propagate return value from __change_memory_common
Failure to propagate errors in arm64 page attribute changes can bypass rodata security protections, allowing potential memory corruption or privilege escalation.
- 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-2025-68737?
CVE-2025-68737 is a vulnerability in Linux, published on 24 Dec 2025. 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/pageattr: Propagate return value from __change_memory_common
The rodata=on security measure requires that any code path which does vmalloc -> set_memory_ro/set_memory_rox must protect the linear map alias too. Therefore, if such a call fails, we must abort set_memory_* and caller must take appropriate action; currently we are suppressing the error, and there is a real chance of such an error arising post commit a166563e7ec3 ("arm64: mm: support large block mapping when rodata=full"). Therefore, propagate any error to the caller.
Which versions are affected by CVE-2025-68737?
How do I fix CVE-2025-68737?
Apply the vendor's patch.
Is CVE-2025-68737 being exploited?
There is no known exploitation of CVE-2025-68737 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2025-68737, GHSA-ww8h-qfvw-pj5m, UBUNTU-CVE-2025-68737.