Description
In the Linux kernel, the following vulnerability has been resolved:
arm64: mte: Do not warn if the page is already tagged in copy_highpage()
The arm64 copy_highpage() assumes that the destination page is newly allocated and not MTE-tagged (PG_mte_tagged unset) and warns accordingly. However, following commit 060913999d7a ("mm: migrate: support poisoned recover from migrate folio"), folio_mc_copy() is called before __folio_migrate_mapping(). If the latter fails (-EAGAIN), the copy will be done again to the same destination page. Since copy_highpage() already set the PG_mte_tagged flag, this second copy will warn.
Replace the WARN_ON_ONCE(page already tagged) in the arm64 copy_highpage() with a comment.
Metrics
No CVSS score has been published yet.
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 060913999d7a9e50c283fdb15253fc27974ddadc, < 5ff5765a1fc526f07d3bbaedb061d970eb13bcf4; >= 060913999d7a9e50c283fdb15253fc27974ddadc, < 0bbf3fc6e9211fce9889fe8efbb89c220504d617; >= 060913999d7a9e50c283fdb15253fc27974ddadc, < b98c94eed4a975e0c80b7e90a649a46967376f58 |
| Linux | Linux | 6.11 |
References
Timeline
- Published
- Dec 16, 2025
- Last modified
- Oct 14, 2026
- NVD status
- Deferred