CVE-2026-31445 is a medium severity vulnerability in the Linux kernel's mm/damon/core subsystem. It involves the use of a partially updated or corrupted damon_ctx context after a failed damon_commit_ctx() call due to internal memory allocation failure. This can lead to unexpected behaviors including potential NULL pointer dereference. The issue arises because the system may continue using a half-online-committed context that should be discarded. The fix introduces a flag to mark such corrupted contexts and prevent their further use.