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CVE-2023-53275

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

ALSA: hda: fix a possible null-pointer dereference due to data race in snd_hdac_regmap_sync()

The variable codec->regmap is often protected by the lock codec->regmap_lock when is accessed. However, it is accessed without holding the lock when is accessed in snd_hdac_regmap_sync():

In my opinion, this may be a harmful race, because if codec->regmap is set to NULL right after the condition is checked, a null-pointer dereference can occur in the called function regcache_sync():

To fix this possible null-pointer dereference caused by data race, the mutex_lock coverage is extended to protect the if statement as well as the function call to regcache_sync().

Detalles técnicos trazas, registros y código del informe original
  if (codec->regmap)

  map->lock(map->lock_arg); --> Line 360 in drivers/base/regmap/regcache.c

[ Note: the lack of the regmap_lock itself is harmless for the current
  codec driver implementations, as snd_hdac_regmap_sync() is only for
  PM runtime resume that is prohibited during the codec probe.
  But the change makes the whole code more consistent, so it's merged
  as is -- tiwai ]

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
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