tracing: Check return value of __register_event() in trace_module_add_events()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74471
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 13:17:51 UTC
Updated2026-08-15 13:17:51 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected ae63b31e4d0e2ec09c569306ea46f664508ef717 d61ee2a27dfd5eb43ddc18af40168f5b9eb1cea5 git Not specified
CNA Linux Linux affected ae63b31e4d0e2ec09c569306ea46f664508ef717 22f954f7a8afe975e85517aff41b35defe05144b git Not specified
CNA Linux Linux affected ae63b31e4d0e2ec09c569306ea46f664508ef717 cbb5ed3be9cae70e1c12b1991009b4e12bf4a4ca git Not specified
CNA Linux Linux affected ae63b31e4d0e2ec09c569306ea46f664508ef717 000765dcdc3edf128990762790543adc4b868f6c git Not specified
CNA Linux Linux affected ae63b31e4d0e2ec09c569306ea46f664508ef717 ac8719969e6c3c54e939834df812bc41f25453cf git Not specified
CNA Linux Linux affected 3.10 Not specified
CNA Linux Linux unaffected 3.10 semver Not specified
CNA Linux Linux unaffected 6.6.151 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.103 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc6 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d61ee2a27dfd5eb43ddc18af40168f5b9eb1cea5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/22f954f7a8afe975e85517aff41b35defe05144b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/000765dcdc3edf128990762790543adc4b868f6c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ac8719969e6c3c54e939834df812bc41f25453cf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cbb5ed3be9cae70e1c12b1991009b4e12bf4a4ca 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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