CVE-2026-90275
Description
In the Linux kernel, the following vulnerability has been resolved: md/raid1: don't set array_frozen in raid1_takeover() raid1_takeover() sets conf->array_frozen = 1 on the newly-allocated r1conf and nothing ever clears it, so every I/O to the array stalls permanently once _wait_barrier() sees it stuck at 1. This used to be harmless: level_store() called mddev_resume() right after pers->run(), which called raid1_quiesce(mddev, 0) and cleared array_frozen back to 0 regardless of what raid1_takeover() set. Commit b39f35ebe86d ("md: don't quiesce in mddev_suspend()") removed that quiesce(mddev, 0) call, so the pre-set now sticks. setup_conf() already zero-initializes the new r1conf via kzalloc, so just don't set array_frozen here. Same class of bug as commit 892da88d1cd9 ("md/raid10: fix a 'conf->barrier' leakage in raid10_takeover()"), also triggered by b39f35ebe86d.
How to fix
- Linux Linux668d99ba47210ab6ceb18f1cf022c0accca7e3bb, c57ec2749ee03cace564eec7bb37c89dc3d8d47b, f9cdb5bb8efbf401e84d850828271af87e6be2dc, b6ec4bf1ec4446c0213c08ea493e48e6b83cd1af, dc386aa0ac0a3ec06c9a3ea9b064b073fb72a916 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | b39f35ebe86d88788d85f61e83c81c308cb76727 ≤ v < 668d99ba47210ab6ceb18f1cf022c0accca7e3bb, b39f35ebe86d88788d85f61e83c81c308cb76727 ≤ v < c57ec2749ee03cace564eec7bb37c89dc3d8d47b, b39f35ebe86d88788d85f61e83c81c308cb76727 ≤ v < f9cdb5bb8efbf401e84d850828271af87e6be2dc, b39f35ebe86d88788d85f61e83c81c308cb76727 ≤ v < b6ec4bf1ec4446c0213c08ea493e48e6b83cd1af, b39f35ebe86d88788d85f61e83c81c308cb76727 ≤ v < dc386aa0ac0a3ec06c9a3ea9b064b073fb72a916, 6.6 | 668d99ba47210ab6ceb18f1cf022c0accca7e3bb, c57ec2749ee03cace564eec7bb37c89dc3d8d47b, f9cdb5bb8efbf401e84d850828271af87e6be2dc, b6ec4bf1ec4446c0213c08ea493e48e6b83cd1af, dc386aa0ac0a3ec06c9a3ea9b064b073fb72a916 |
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