cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all()
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-667 and the CVSS impact.
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.4.213 to before 5.4.215; 5.10.143 to before 5.10.145; 5.15.68 to before 5.15.70; 5.19.9 to before 5.19.11 | 5.4.215, 5.10.145, 5.15.70, 5.19.11 | Patch available | CNA |
- Linux VendorLinux Affected 5.4.213 to before 5.4.215; 5.10.143 to before 5.10.145; 5.15.68 to before 5.15.70; 5.19.9 to before 5.19.11 Fixed in 5.4.215, 5.10.145, 5.15.70, 5.19.11 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.4.213 to before 5.4.215; 5.10.143 to before 5.10.145; after 5.15.68, before 5.15.70; 5.19.9 to before 5.19.11 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.4.213 to before 5.4.215; 5.10.143 to before 5.10.145; after 5.15.68, before 5.15.70; 5.19.9 to before 5.19.11 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.4.215, 5.10.145, 5.15.70, 5.19.11
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
Not affected: 2 products
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2022-48671
- 2026-10-03 Alias added: GHSA-hx7p-6fcf-8gxf
References
Patch 6
- https://git.kernel.org/stable/c/321488cfac7d0eb6d97de467015ff754f85813ff
- https://git.kernel.org/stable/c/07191f984842d50020789ff14c75da436a7f46a9
- https://git.kernel.org/stable/c/9f267393b036f1470fb12fb892d59e7ff8aeb58d
- https://git.kernel.org/stable/c/5db17805b6ba4c34dab303f49aea3562fc25af75
- https://git.kernel.org/stable/c/99bc25748e394d17f9e8b10cc7f273b8e64c1c7e
- https://git.kernel.org/stable/c/43626dade36fa74d3329046f4ae2d7fdefe401c6
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- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2022-48671 · CVE Program
- CVE-2022-48671 · NVD
- FIRST EPSS
- GHSA-hx7p-6fcf-8gxf · GitHub Advisory Database · CC BY 4.0
- CVE-2022-48671 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences