CVE-2026-74471

In the Linux kernel, the following vulnerability has been resolved: tracing: Check return value of __register_event() in trace_module_add_events() trace_module_add_events() ignores the return value of __register_event() and unconditionally calls __add_event_to_tracers() for each event. If __register_event() fails (for example, if event_init() fails), the trace_event_call is not added to ftrace_events list, but __add_event_to_tracers() still creates a trace_event_file pointing to it. If module loading subsequently fails and module memory is freed, tracing state retains a stale trace_event_call pointer in trace_event_file, leading to a use-after-free when tracefs or tracing subsystem operations are later executed. Fix this by checking the return value of __register_event() and only calling __add_event_to_tracers() if event registration succeeded.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/000765dcdc3edf128990762790543adc4b868f6c
https://git.kernel.org/stable/c/22f954f7a8afe975e85517aff41b35defe05144b
https://git.kernel.org/stable/c/3bf965a2827c44f03294107703e7ba53fbd0a69a
https://git.kernel.org/stable/c/54b7a358f6399c1242d2fb7f4f96085af34baa5e
https://git.kernel.org/stable/c/9d6d79744f01eacaf3d5522f4fcd59939581abfd
https://git.kernel.org/stable/c/ac8719969e6c3c54e939834df812bc41f25453cf
https://git.kernel.org/stable/c/cbb5ed3be9cae70e1c12b1991009b4e12bf4a4ca
https://git.kernel.org/stable/c/d61ee2a27dfd5eb43ddc18af40168f5b9eb1cea5

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 13:17

Updated : 2026-08-19 17:21

NVD link : CVE-2026-74471

Mitre link : CVE-2026-74471

CVE.ORG link : CVE-2026-74471

JSON object : View

Products Affected

No product.

CWE

No CWE.

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"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ac8719969e6c3c54e939834df812bc41f25453cf", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/cbb5ed3be9cae70e1c12b1991009b4e12bf4a4ca", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d61ee2a27dfd5eb43ddc18af40168f5b9eb1cea5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Check return value of __register_event() in trace_module_add_events()\n\ntrace_module_add_events() ignores the return value of __register_event()\nand unconditionally calls __add_event_to_tracers() for each event.\n\nIf __register_event() fails (for example, if event_init() fails), the\ntrace_event_call is not added to ftrace_events list, but\n__add_event_to_tracers() still creates a trace_event_file pointing to it.\nIf module loading subsequently fails and module memory is freed, tracing\nstate retains a stale trace_event_call pointer in trace_event_file,\nleading to a use-after-free when tracefs or tracing subsystem operations\nare later executed.\n\nFix this by checking the return value of __register_event() and only\ncalling __add_event_to_tracers() if event registration succeeded."}], "lastModified": "2026-08-19T17:21:04.320", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}