CVE-2022-50494

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Source
https://cve.org/CVERecord?id=CVE-2022-50494
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-50494.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-50494
Downstream
Related
Published
2025-10-04T15:43:46.562Z
Modified
2026-03-12T03:26:35.199703Z
Summary
thermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash
Details

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

thermal: intelpowerclamp: Use getcpu() instead of smpprocessorid() to avoid crash

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

BUG: using smpprocessorid() in preemptible [00000000] code: bash/15687 caller is debugsmpprocessorid+0x17/0x20 CPU: 4 PID: 15687 Comm: bash Not tainted 5.19.0-rc7+ #57 Call Trace: <TASK> dumpstacklvl+0x49/0x63 dumpstack+0x10/0x16 checkpreemptiondisabled+0xdd/0xe0 debugsmpprocessorid+0x17/0x20 powerclampsetcurstate+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 cpusreadlock(), hence the above warning.

Use getcpu() instead of smpprocessor_id() to avoid this BUG.

[ rjw: Subject edits ]

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50494.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
d6d71ee4a14ae602db343ec48c491851d7ec5267
Fixed
3e799e815097febbcb81b472285be824f5d089f9
Fixed
0f91f66c568b316b19cb042cf50584467b3bdff4
Fixed
6904727db0eb62fb0c2dce1cf331c341d97ee4b7
Fixed
5a646c38f648185ee2c62f2a19da3c6f04e27612
Fixed
513943bf879d45005213e6f5cfb7d9e9943f589f
Fixed
5614908434451aafbf9b24cb5247cf1d21269f76
Fixed
6e2a347b304224b2aeb1c0ea000d1cf8a02cc592
Fixed
418fae0700e85a498062424f8656435c32cdb200
Fixed
68b99e94a4a2db6ba9b31fe0485e057b9354a640

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-50494.json"