In the Linux kernel, the following vulnerability has been resolved:

thermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash

When CPU 0 is offline and intel_powerclamp is used to inject
idle, it generates kernel BUG:

BUG: using smp_processor_id() in preemptible [00000000] code: bash/15687
caller is debug_smp_processor_id+0x17/0x20
CPU: 4 PID: 15687 Comm: bash Not tainted 5.19.0-rc7+ #57
Call Trace:
<TASK>
dump_stack_lvl+0x49/0x63
dump_stack+0x10/0x16
check_preemption_disabled+0xdd/0xe0
debug_smp_processor_id+0x17/0x20
powerclamp_set_cur_state+0x7f/0xf9 [intel_powerclamp]
...
...

Here CPU 0 is the control CPU by default and changed to the current CPU,
if CPU 0 offlined. This check has to be performed under cpus_read_lock(),
hence the above warning.

Use get_cpu() instead of smp_processor_id() to avoid this BUG.

[ rjw: Subject edits ]

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00049.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
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Advisories
Source ID Title
EUVD EUVD EUVD-2022-55660 In the Linux kernel, the following vulnerability has been resolved: thermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash When CPU 0 is offline and intel_powerclamp is used to inject idle, it generates kernel BUG: BUG: using smp_processor_id() in preemptible [00000000] code: bash/15687 caller is debug_smp_processor_id+0x17/0x20 CPU: 4 PID: 15687 Comm: bash Not tainted 5.19.0-rc7+ #57 Call Trace: <TASK> dump_stack_lvl+0x49/0x63 dump_stack+0x10/0x16 check_preemption_disabled+0xdd/0xe0 debug_smp_processor_id+0x17/0x20 powerclamp_set_cur_state+0x7f/0xf9 [intel_powerclamp] ... ... Here CPU 0 is the control CPU by default and changed to the current CPU, if CPU 0 offlined. This check has to be performed under cpus_read_lock(), hence the above warning. Use get_cpu() instead of smp_processor_id() to avoid this BUG. [ rjw: Subject edits ]
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/0f91f66c568b316b19cb042cf50584467b3bdff4 cve-icon cve-icon
https://git.kernel.org/stable/c/3e799e815097febbcb81b472285be824f5d089f9 cve-icon cve-icon
https://git.kernel.org/stable/c/418fae0700e85a498062424f8656435c32cdb200 cve-icon cve-icon
https://git.kernel.org/stable/c/513943bf879d45005213e6f5cfb7d9e9943f589f cve-icon cve-icon
https://git.kernel.org/stable/c/5614908434451aafbf9b24cb5247cf1d21269f76 cve-icon cve-icon
https://git.kernel.org/stable/c/5a646c38f648185ee2c62f2a19da3c6f04e27612 cve-icon cve-icon
https://git.kernel.org/stable/c/68b99e94a4a2db6ba9b31fe0485e057b9354a640 cve-icon cve-icon
https://git.kernel.org/stable/c/6904727db0eb62fb0c2dce1cf331c341d97ee4b7 cve-icon cve-icon
https://git.kernel.org/stable/c/6e2a347b304224b2aeb1c0ea000d1cf8a02cc592 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025100418-CVE-2022-50494-00a0@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2022-50494 cve-icon
https://www.cve.org/CVERecord?id=CVE-2022-50494 cve-icon
History

Mon, 06 Oct 2025 22:45:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Moderate

Mon, 06 Oct 2025 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Sat, 04 Oct 2025 16:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: thermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash When CPU 0 is offline and intel_powerclamp is used to inject idle, it generates kernel BUG: BUG: using smp_processor_id() in preemptible [00000000] code: bash/15687 caller is debug_smp_processor_id+0x17/0x20 CPU: 4 PID: 15687 Comm: bash Not tainted 5.19.0-rc7+ #57 Call Trace: <TASK> dump_stack_lvl+0x49/0x63 dump_stack+0x10/0x16 check_preemption_disabled+0xdd/0xe0 debug_smp_processor_id+0x17/0x20 powerclamp_set_cur_state+0x7f/0xf9 [intel_powerclamp] ... ... Here CPU 0 is the control CPU by default and changed to the current CPU, if CPU 0 offlined. This check has to be performed under cpus_read_lock(), hence the above warning. Use get_cpu() instead of smp_processor_id() to avoid this BUG. [ rjw: Subject edits ]
Title thermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-10-04T15:43:46.562Z

Reserved: 2025-10-04T15:39:19.464Z

Link: CVE-2022-50494

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-04T16:15:46.420

Modified: 2025-10-06T14:56:21.733

Link: CVE-2022-50494

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-10-04T00:00:00Z

Links: CVE-2022-50494 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-10-06T14:41:17Z

Weaknesses

No weakness.