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CVE Record

CVE-2022-50319: coresight: trbe: remove cpuhp instance node before remove cpuhp state

In the Linux kernel, the following vulnerability has been resolved: coresight: trbe: remove cpuhp instance node before remove cpuhp state cpuhp_state_add_instance() and cpuhp_state_remove_instance() should be used in pairs. Or there will lead to the warn on cpuhp_remove_multi_state() since the cpuhp_step list is not empty. The following is the error log with 'rmmod coresight-trbe': Error: Removing state 215 which has instances left. Call trace: __cpuhp_remove_state_cpuslocked+0x144/0x160 __cpuhp_remove_state+0xac/0x100 arm_trbe_device_remove+0x2c/0x60 [coresight_trbe] platform_remove+0x34/0x70 device_remove+0x54/0x90 device_release_driver_internal+0x1e4/0x250 driver_detach+0x5c/0xb0 bus_remove_driver+0x64/0xc0 driver_unregister+0x3c/0x70 platform_driver_unregister+0x20/0x30 arm_trbe_exit+0x1c/0x658 [coresight_trbe] __arm64_sys_delete_module+0x1ac/0x24c invoke_syscall+0x50/0x120 el0_svc_common.constprop.0+0x58/0x1a0 do_el0_svc+0x38/0xd0 el0_svc+0x2c/0xc0 el0t_64_sync_handler+0x1ac/0x1b0 el0t_64_sync+0x19c/0x1a0 ---[ end trace 0000000000000000 ]---

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2022-50319 is a Linux kernel issue in the CoreSight TRBE driver cleanup path. The public record describes a kernel warning when the coresight-trbe module is removed because CPU hotplug state instances remain registered. No CVSS score, CWE, or active exploitation evidence is provided.

Executive priority

Treat as routine kernel maintenance unless your environment relies on ARM64 CoreSight TRBE. There is no cited exploitation and no CVSS score, but fixed kernels should be adopted through normal patch cycles.

Technical view

The fix pairs cpuhp_state_add_instance() with cpuhp_state_remove_instance() before removing the multi-state. Without this, cpuhp_remove_multi_state() warns that instances remain. The observed path is rmmod coresight-trbe on arm64, in arm_trbe_device_remove()/arm_trbe_exit(). Stable kernel commits are referenced as fixes.

Likely exposure

Likely limited to Linux systems with the CoreSight TRBE kernel driver present and removable, especially ARM64 environments. The affected-version data in the provided record is incomplete and should be validated against distribution kernel advisories.

Exploitation context

No source in the bundle states active exploitation, public exploit availability, or remote attackability. The described trigger is module removal, which generally requires local administrative capability. Business impact is unclear from available evidence.

Researcher notes

The CVE record is sparse: no CVSS, CWE, or detailed impact analysis. The available evidence points to an improper CPU hotplug instance cleanup ordering bug in the Linux kernel TRBE driver, fixed by stable commits.

Mitigation direction

  • Review your Linux vendor’s advisory for CVE-2022-50319.
  • Update to a kernel build containing the referenced stable commits.
  • Prioritize ARM64 systems using or loading coresight-trbe.
  • If unable to update, follow vendor guidance for CoreSight TRBE exposure reduction.

Validation and detection

  • Inventory Linux kernel versions across ARM64 systems.
  • Check whether the coresight-trbe driver is present or loaded.
  • Compare installed kernels against vendor-fixed builds or referenced commits.
  • Review kernel logs for the documented CPU hotplug warning during module removal.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
5Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux3fbf7f011f2426dac8c982f1d2ef469a7959a524, 3fbf7f011f2426dac8c982f1d2ef469a7959a524, 3fbf7f011f2426dac8c982f1d2ef469a7959a524, 3fbf7f011f2426dac8c982f1d2ef469a7959a524unaffected
LinuxLinux5.13, 0, 5.15.86, 6.0.16, 6.1.2, 6.2affected
Weakness

CWE details

No CWE listed

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