cve-2023-52847
Vulnerability from cvelistv5
Published
2024-05-21 15:31
Modified
2024-08-02 23:11
Severity
Summary
media: bttv: fix use after free error due to btv->timeout timer
References
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"title": "media: bttv: fix use after free error due to btv-\u003etimeout timer",
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"nvd": "{\"cve\":{\"id\":\"CVE-2023-52847\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T16:15:21.873\",\"lastModified\":\"2024-05-21T16:53:56.550\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmedia: bttv: fix use after free error due to btv-\u003etimeout timer\\n\\nThere may be some a race condition between timer function\\nbttv_irq_timeout and bttv_remove. The timer is setup in\\nprobe and there is no timer_delete operation in remove\\nfunction. When it hit kfree btv, the function might still be\\ninvoked, which will cause use after free bug.\\n\\nThis bug is found by static analysis, it may be false positive.\\n\\nFix it by adding del_timer_sync invoking to the remove function.\\n\\ncpu0 cpu1\\n bttv_probe\\n -\u003etimer_setup\\n -\u003ebttv_set_dma\\n -\u003emod_timer;\\nbttv_remove\\n -\u003ekfree(btv);\\n -\u003ebttv_irq_timeout\\n -\u003eUSE btv\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: medio: bttv: correcci\u00f3n de uso despu\u00e9s de error gratuito debido a btv-\u0026gt;timeout timer. Puede haber alguna condici\u00f3n de ejecuci\u00f3n entre la funci\u00f3n del temporizador bttv_irq_timeout y bttv_remove. El temporizador est\u00e1 configurado en la sonda y no hay ninguna operaci\u00f3n timer_delete en la funci\u00f3n de eliminaci\u00f3n. Cuando llega a kfree btv, es posible que la funci\u00f3n a\u00fan se invoque, lo que provocar\u00e1 un error de use after free. Este error se encuentra mediante an\u00e1lisis est\u00e1tico y puede ser un falso positivo. Solucionelo agregando del_timer_sync invocando a la funci\u00f3n de eliminaci\u00f3n. cpu0 cpu1 bttv_probe -\u0026gt;timer_setup -\u0026gt;bttv_set_dma -\u0026gt;mod_timer; bttv_remove -\u0026gt;kfree(btv); -\u0026gt;bttv_irq_timeout -\u0026gt;USE btv\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1871014d6ef4812ad11ef7d838d73ce09d632267\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/20568d06f6069cb835e05eed432edf962645d226\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2f3d9198cdae1cb079ec8652f4defacd481eab2b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/51c94256a83fe4e17406c66ff3e1ad7d242d8574\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/847599fffa528b2cdec4e21b6bf7586dad982132\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b35fdade92c5058a5e727e233fe263b828de2c9a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bbc3b8dd2cb7817e703f112d988e4f4728f0f2a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bd5b50b329e850d467e7bcc07b2b6bde3752fbda\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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