CVE-2023-53275 (GCVE-0-2023-53275)
Vulnerability from cvelistv5
Published
2025-09-16 08:11
Modified
2026-05-23 15:28
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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(): if (codec->regmap) 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(): map->lock(map->lock_arg); --> Line 360 in drivers/base/regmap/regcache.c 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(). [ 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 ]
References
Impacted products
Vendor Product Version
Linux Linux Version: 69d5dc286d05441ca2f854ae8df11201f6f9b706
Version: 1a462be52f4505a2719631fb5aa7bfdbd37bfd8d
Version: 1a462be52f4505a2719631fb5aa7bfdbd37bfd8d
Version: 1a462be52f4505a2719631fb5aa7bfdbd37bfd8d
Version: 1a462be52f4505a2719631fb5aa7bfdbd37bfd8d
Version: 1a462be52f4505a2719631fb5aa7bfdbd37bfd8d
Version: 5.4.43   ≤
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