MediumFix available
cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all()
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all() syzbot is hitting percpu_rwsem_assert_held(&cpu_hotplug_lock) warning at cpuset_attach() [1], for commit 4f7e7236435ca0ab ("cgroup: Fix threadgroup_rwsem <-> cpus_read_lock() deadlock") missed that cpuset_attach() is also called from cgroup_attach_task_all(). Add cpus_read_lock() like what cgroup_procs_write_start() does.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.145, 5.15.70, 5.19.11, 5.4.215
- CVEs
- CVE-2022-48671
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 03:49 UTC · Revision 1
Source evidence
cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all()
core-osv · Original sourcePublished 3 May 2024, 14:50 UTC
In the Linux kernel, the following vulnerability has been resolved: cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all() syzbot is hitting percpu_rwsem_assert_held(&cpu_hotplug_lock) warning at cpuset_attach() [1], for commit 4f7e7236435ca0ab ("cgroup: Fix threadgroup_rwsem <-> cpus_read_lock() deadlock") missed that cpuset_attach() is also called from cgroup_attach_task_all(). Add cpus_read_lock() like what cgroup_procs_write_start() does.
osv:CVE-2022-48671
Kernel
Fixed versions: 5.4.215, 5.10.145, 5.15.70, 5.19.11
Complete source record
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"id": "99418b26c92c2d9f8274cb220b5fff33ed85a1a402e9d714e7be9f0da0834f41",
"url": "https://osv.dev/vulnerability/CVE-2022-48671",
"method": "structured",
"payload": {
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"title": "cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all()",
"summary": "In the Linux kernel, the following vulnerability has been resolved: cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all() syzbot is hitting percpu_rwsem_assert_held(&cpu_hotplug_lock) warning at cpuset_attach() [1], for commit 4f7e7236435ca0ab (\"cgroup: Fix threadgroup_rwsem <-> cpus_read_lock() deadlock\") missed that cpuset_attach() is also called from cgroup_attach_task_all(). Add cpus_read_lock() like what cgroup_procs_write_start() does.",
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"modified": "2026-10-28T02:30:49.722402470Z",
"provider": "osv",
"references": [
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"source_id": "core-osv",
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"published_at": "2024-05-03T14:50:23.558+00:00"
}