CVE-2026-89754 - mm/pagewalk: fix stale walk-action escaping walk_pmd_range()
Brief
CVE ID : CVE-2026-89754
Published : Sept. 11, 2026, 8:20 p. m.
- 32 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved:
mm/pagewalk: fix stale walk-action escaping walk_pmd_range()
If -pmd_entry() sets walk-action = ACTION_AGAIN, the pmd_none() check is retried. The PMD entry may be cleared at the point of retry.
In this case, if walk-ops-install_pte is not specified, the code continues to the next PMD entry in the range without resetting walk-action to ACTION_SUBTREE.
This leaves walk-action erroneously set to ACTION_AGAIN, which is incorrect.