CVE-2022-49410 (GCVE-0-2022-49410)
Vulnerability from cvelistv5
Published
2025-02-26 02:12
Modified
2025-05-04 08:37
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix potential double free in create_var_ref() In create_var_ref(), init_var_ref() is called to initialize the fields of variable ref_field, which is allocated in the previous function call to create_hist_field(). Function init_var_ref() allocates the corresponding fields such as ref_field->system, but frees these fields when the function encounters an error. The caller later calls destroy_hist_field() to conduct error handling, which frees the fields and the variable itself. This results in double free of the fields which are already freed in the previous function. Fix this by storing NULL to the corresponding fields when they are freed in init_var_ref().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/058cb6d86b9789377216c936506b346aaa1eb581Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/37443b3508b8cce6832f8d25cb4550b2f7801f50Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4fdfb15e08598711dbf50daf56a33965232daf0ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/99696a2592bca641eb88cc9a80c90e591afebd0fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bd83ff3bbfb003832481c9bff999d12385f396aePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c27f744ceefadc7bbeb14233b6abc150ced617d2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f8b383f83cb573152c577eca1ef101e89995b72aPatch
Impacted products
Vendor Product Version
Linux Linux Version: 067fe038e70f6e64960d26a79c4df5f1413d0f13
Version: 067fe038e70f6e64960d26a79c4df5f1413d0f13
Version: 067fe038e70f6e64960d26a79c4df5f1413d0f13
Version: 067fe038e70f6e64960d26a79c4df5f1413d0f13
Version: 067fe038e70f6e64960d26a79c4df5f1413d0f13
Version: 067fe038e70f6e64960d26a79c4df5f1413d0f13
Version: 067fe038e70f6e64960d26a79c4df5f1413d0f13
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   Linux Linux Version: 4.17
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This results in double free of the fields which\\nare already freed in the previous function.\\n\\nFix this by storing NULL to the corresponding fields when they are freed\\nin init_var_ref().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: seguimiento: Se corrige la posible doble liberaci\u00f3n en create_var_ref() En create_var_ref(), se llama a init_var_ref() para inicializar los campos de la variable ref_field, que se asigna en la llamada de funci\u00f3n anterior a create_hist_field(). La funci\u00f3n init_var_ref() asigna los campos correspondientes, como ref_field-\u0026gt;system, pero libera estos campos cuando la funci\u00f3n encuentra un error. El llamador luego llama a destroy_hist_field() para realizar la gesti\u00f3n de errores, que libera los campos y la variable misma. Esto da como resultado una doble liberaci\u00f3n de los campos que ya est\u00e1n liberados en la funci\u00f3n anterior. 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  }
}


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