{"id":"DEBIAN-CVE-2023-53275","details":"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-\u003eregmap is often protected by the lock codec-\u003eregmap_lock when is accessed. However, it is accessed without holding the lock when is accessed in snd_hdac_regmap_sync():    if (codec-\u003eregmap)  In my opinion, this may be a harmful race, because if codec-\u003eregmap is set to NULL right after the condition is checked, a null-pointer dereference can occur in the called function regcache_sync():    map-\u003elock(map-\u003elock_arg); --\u003e 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 ]","modified":"2026-09-15T09:02:50.890904048Z","published":"2025-09-16T08:15:36.360Z","upstream":["CVE-2023-53275"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53275"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.52-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53275.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.13-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53275.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.13-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53275.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}