CVE-2025-71135 - md/raid5: fix possible null-pointer dereferences in raid5_store_group_thread_cnt()

CVE-2025-71135 - md/raid5: fix possible null-pointer dereferences in raid5_store_group_thread_cnt()

https://cvefeed.io/rssfeed/latest.atom / Wed, 01/14/2026 - 16:57
CVE ID : CVE-2025-71135
Published : Jan. 14, 2026, 3:16 p.m. | 41 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: md/raid5: fix possible null-pointer dereferences in raid5_store_group_thread_cnt() The variable mddev->private is first assigned to conf and then checked: conf = mddev->private; if (!conf) ... If conf is NULL, then mddev->private is also NULL. In this case, null-pointer dereferences can occur when calling raid5_quiesce(): raid5_quiesce(mddev, true); raid5_quiesce(mddev, false); since mddev->private is assigned to conf again in raid5_quiesce(), and conf is dereferenced in several places, for example: conf->quiesce = 0; wake_up(&conf->wait_for_quiescent); To fix this issue, the function should unlock mddev and return before invoking raid5_quiesce() when conf is NULL, following the existing pattern in raid5_change_consistency_policy().
Severity: 0.0 | NA
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