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 ]
References
Configurations
Configuration 1 (hide)
|
History
23 Jan 2026, 20:54
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| First Time |
Linux
Linux linux Kernel |
|
| References | () https://git.kernel.org/stable/c/0f91f66c568b316b19cb042cf50584467b3bdff4 - Patch | |
| References | () https://git.kernel.org/stable/c/3e799e815097febbcb81b472285be824f5d089f9 - Patch | |
| References | () https://git.kernel.org/stable/c/418fae0700e85a498062424f8656435c32cdb200 - Patch | |
| References | () https://git.kernel.org/stable/c/513943bf879d45005213e6f5cfb7d9e9943f589f - Patch | |
| References | () https://git.kernel.org/stable/c/5614908434451aafbf9b24cb5247cf1d21269f76 - Patch | |
| References | () https://git.kernel.org/stable/c/5a646c38f648185ee2c62f2a19da3c6f04e27612 - Patch | |
| References | () https://git.kernel.org/stable/c/68b99e94a4a2db6ba9b31fe0485e057b9354a640 - Patch | |
| References | () https://git.kernel.org/stable/c/6904727db0eb62fb0c2dce1cf331c341d97ee4b7 - Patch | |
| References | () https://git.kernel.org/stable/c/6e2a347b304224b2aeb1c0ea000d1cf8a02cc592 - Patch | |
| CWE | NVD-CWE-noinfo |
04 Oct 2025, 16:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-10-04 16:15
Updated : 2026-01-23 20:54
NVD link : CVE-2022-50494
Mitre link : CVE-2022-50494
CVE.ORG link : CVE-2022-50494
JSON object : View
Products Affected
linux
- linux_kernel
CWE