{"id":"CVE-2023-53275","state":"PUBLISHED","title":"ALSA: hda: fix a possible null-pointer dereference due to data race in snd_hdac_regmap_sync()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: hda: fix a possible null-pointer dereference due to data race in snd_hdac_regmap_sync()\n\nThe variable codec->regmap is often protected by the lock\ncodec->regmap_lock when is accessed. However, it is accessed without\nholding the lock when is accessed in snd_hdac_regmap_sync():\n\n  if (codec->regmap)\n\nIn my opinion, this may be a harmful race, because if codec->regmap is\nset to NULL right after the condition is checked, a null-pointer\ndereference can occur in the called function regcache_sync():\n\n  map->lock(map->lock_arg); --> Line 360 in drivers/base/regmap/regcache.c\n\nTo fix this possible null-pointer dereference caused by data race, the\nmutex_lock coverage is extended to protect the if statement as well as the\nfunction call to regcache_sync().\n\n[ Note: the lack of the regmap_lock itself is harmless for the current\n  codec driver implementations, as snd_hdac_regmap_sync() is only for\n  PM runtime resume that is prohibited during the codec probe.\n  But the change makes the whole code more consistent, so it's merged\n  as is -- tiwai ]","publishedAt":"2025-09-16T08:11:10.475Z","updatedAt":"2026-05-23T15:28:25.281Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"69d5dc286d05441ca2f854ae8df11201f6f9b706","status":"affected","lessThan":"109f0aaa0b8838a88af9125b79579023539300a7","versionType":"git"},{"version":"1a462be52f4505a2719631fb5aa7bfdbd37bfd8d","status":"affected","lessThan":"9f9eed451176ffcac6b5ba0f6dae1a6b4a1cb0eb","versionType":"git"},{"version":"1a462be52f4505a2719631fb5aa7bfdbd37bfd8d","status":"affected","lessThan":"8703b26387e1fa4f8749db98d24c67617b873acb","versionType":"git"},{"version":"1a462be52f4505a2719631fb5aa7bfdbd37bfd8d","status":"affected","lessThan":"cdd412b528dee6e0851c4735d6676ec138da13a4","versionType":"git"},{"version":"1a462be52f4505a2719631fb5aa7bfdbd37bfd8d","status":"affected","lessThan":"b32e40379e5b2814de0c4bc199edc2d82317dc07","versionType":"git"},{"version":"1a462be52f4505a2719631fb5aa7bfdbd37bfd8d","status":"affected","lessThan":"1f4a08fed450db87fbb5ff5105354158bdbe1a22","versionType":"git"},{"version":"5.4.43","status":"affected","lessThan":"5.4.255","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/hda/hdac_regmap.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.6","versionType":"semver"},{"version":"5.4.255","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.192","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.128","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.47","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.4.12","status":"unaffected","lessThanOrEqual":"6.4.*","versionType":"semver"},{"version":"6.5","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/hda/hdac_regmap.c"]}],"references":["https://git.kernel.org/stable/c/109f0aaa0b8838a88af9125b79579023539300a7","https://git.kernel.org/stable/c/9f9eed451176ffcac6b5ba0f6dae1a6b4a1cb0eb","https://git.kernel.org/stable/c/8703b26387e1fa4f8749db98d24c67617b873acb","https://git.kernel.org/stable/c/cdd412b528dee6e0851c4735d6676ec138da13a4","https://git.kernel.org/stable/c/b32e40379e5b2814de0c4bc199edc2d82317dc07","https://git.kernel.org/stable/c/1f4a08fed450db87fbb5ff5105354158bdbe1a22"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53275.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53275","state":"PUBLISHED","datePublished":"2025-09-16T08:11:10.475Z","dateUpdated":"2026-05-23T15:28:25.281Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-09-16T08:09:37.990Z"},"containers":{"cna":{"title":"ALSA: hda: fix a possible null-pointer dereference due to data race in snd_hdac_regmap_sync()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: hda: fix a possible null-pointer dereference due to data race in snd_hdac_regmap_sync()\n\nThe variable codec->regmap is often protected by the lock\ncodec->regmap_lock when is accessed. However, it is accessed without\nholding the lock when is accessed in snd_hdac_regmap_sync():\n\n  if (codec->regmap)\n\nIn my opinion, this may be a harmful race, because if codec->regmap is\nset to NULL right after the condition is checked, a null-pointer\ndereference can occur in the called function regcache_sync():\n\n  map->lock(map->lock_arg); --> Line 360 in drivers/base/regmap/regcache.c\n\nTo fix this possible null-pointer dereference caused by data race, the\nmutex_lock coverage is extended to protect the if statement as well as the\nfunction call to regcache_sync().\n\n[ Note: the lack of the regmap_lock itself is harmless for the current\n  codec driver implementations, as snd_hdac_regmap_sync() is only for\n  PM runtime resume that is prohibited during the codec probe.\n  But the change makes the whole code more consistent, so it's merged\n  as is -- tiwai ]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"69d5dc286d05441ca2f854ae8df11201f6f9b706","status":"affected","lessThan":"109f0aaa0b8838a88af9125b79579023539300a7","versionType":"git"},{"version":"1a462be52f4505a2719631fb5aa7bfdbd37bfd8d","status":"affected","lessThan":"9f9eed451176ffcac6b5ba0f6dae1a6b4a1cb0eb","versionType":"git"},{"version":"1a462be52f4505a2719631fb5aa7bfdbd37bfd8d","status":"affected","lessThan":"8703b26387e1fa4f8749db98d24c67617b873acb","versionType":"git"},{"version":"1a462be52f4505a2719631fb5aa7bfdbd37bfd8d","status":"affected","lessThan":"cdd412b528dee6e0851c4735d6676ec138da13a4","versionType":"git"},{"version":"1a462be52f4505a2719631fb5aa7bfdbd37bfd8d","status":"affected","lessThan":"b32e40379e5b2814de0c4bc199edc2d82317dc07","versionType":"git"},{"version":"1a462be52f4505a2719631fb5aa7bfdbd37bfd8d","status":"affected","lessThan":"1f4a08fed450db87fbb5ff5105354158bdbe1a22","versionType":"git"},{"version":"5.4.43","status":"affected","lessThan":"5.4.255","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/hda/hdac_regmap.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.6","versionType":"semver"},{"version":"5.4.255","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.192","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.128","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.47","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.4.12","status":"unaffected","lessThanOrEqual":"6.4.*","versionType":"semver"},{"version":"6.5","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/hda/hdac_regmap.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/109f0aaa0b8838a88af9125b79579023539300a7"},{"url":"https://git.kernel.org/stable/c/9f9eed451176ffcac6b5ba0f6dae1a6b4a1cb0eb"},{"url":"https://git.kernel.org/stable/c/8703b26387e1fa4f8749db98d24c67617b873acb"},{"url":"https://git.kernel.org/stable/c/cdd412b528dee6e0851c4735d6676ec138da13a4"},{"url":"https://git.kernel.org/stable/c/b32e40379e5b2814de0c4bc199edc2d82317dc07"},{"url":"https://git.kernel.org/stable/c/1f4a08fed450db87fbb5ff5105354158bdbe1a22"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:28:25.281Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.43","versionEndExcluding":"5.4.255"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"5.10.192"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"5.15.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.1.47"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.4.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.5"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2023-53275","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-01-14T18:06:44.564757Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","lang":"en","type":"CWE","description":"CWE-476 NULL Pointer Dereference"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-14T18:12:54.000Z"}}]}}}