CVE-2025-39759

In the Linux kernel, the following vulnerability has been resolved: btrfs: qgroup: fix race between quota disable and quota rescan ioctl There's a race between a task disabling quotas and another running the rescan ioctl that can result in a use-after-free of qgroup records from the...

CVE-2025-39759

CVE-2025-39759 affects the Linux kernel’s btrfs quota subsystem. A race between disabling quotas and running btrfs_ioctl_quota_rescan() can lead to a use-after-free of qgroup records in fs_info->qgroup_tree due to Task B freeing qgroups without holding fs_info->qgroup_lock while Task A iter...