FKIE_CVE-2022-49733

Vulnerability from fkie_nvd - Published: 2025-03-02 15:15 - Updated: 2025-10-01 20:17
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Fix race at SNDCTL_DSP_SYNC There is a small race window at snd_pcm_oss_sync() that is called from OSS PCM SNDCTL_DSP_SYNC ioctl; namely the function calls snd_pcm_oss_make_ready() at first, then takes the params_lock mutex for the rest. When the stream is set up again by another thread between them, it leads to inconsistency, and may result in unexpected results such as NULL dereference of OSS buffer as a fuzzer spotted recently. The fix is simply to cover snd_pcm_oss_make_ready() call into the same params_lock mutex with snd_pcm_oss_make_ready_locked() variant.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4051324a6dafd7053c74c475e80b3ba10ae672b0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/723ac5ab2891b6c10dd6cc78ef5456af593490ebPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8015ef9e8a0ee5cecfd0cb6805834d007ab26f86Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8423f0b6d513b259fdab9c9bf4aaa6188d054c2dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fce793a056c604b41a298317cf704dae255f1b36Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.0
linux linux_kernel 6.0
linux linux_kernel 6.0
linux linux_kernel 6.0
To clipboard 

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: pcm: oss: Fix race at SNDCTL_DSP_SYNC\n\nThere is a small race window at snd_pcm_oss_sync() that is called from\nOSS PCM SNDCTL_DSP_SYNC ioctl; namely the function calls\nsnd_pcm_oss_make_ready() at first, then takes the params_lock mutex\nfor the rest.  When the stream is set up again by another thread\nbetween them, it leads to inconsistency, and may result in unexpected\nresults such as NULL dereference of OSS buffer as a fuzzer spotted\nrecently.\n\nThe fix is simply to cover snd_pcm_oss_make_ready() call into the same\nparams_lock mutex with snd_pcm_oss_make_ready_locked() variant."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: pcm: oss: Corregir ejecuci\u00f3n en SNDCTL_DSP_SYNC Hay una peque\u00f1a ventana de ejecuci\u00f3n en snd_pcm_oss_sync() que se llama desde IOctl SNDCTL_DSP_SYNC PCM de OSS; es decir, la funci\u00f3n llama a snd_pcm_oss_make_ready() primero, luego toma el mutex params_lock para el resto. Cuando otro hilo configura nuevamente la secuencia entre ellos, esto genera inconsistencia y puede dar como resultado resultados inesperados como la desreferencia NULL del b\u00fafer OSS como un fuzzer detectado recientemente. La soluci\u00f3n es simplemente cubrir la llamada a snd_pcm_oss_make_ready() en el mismo mutex params_lock con la variante snd_pcm_oss_make_ready_locked()."
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Detection rules are retrieved from Rulezet.