CVE-2023-53275 (GCVE-0-2023-53275)

Vulnerability from cvelistv5 – Published: 2025-09-16 08:11 – Updated: 2026-05-23 15:28
VLAI
Title
ALSA: hda: fix a possible null-pointer dereference due to data race in snd_hdac_regmap_sync()
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 ]
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:06 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6665 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 69d5dc286d05441ca2f854ae8df11201f6f9b706 , < 109f0aaa0b8838a88af9125b79579023539300a7 (git)
Affected: 1a462be52f4505a2719631fb5aa7bfdbd37bfd8d , < 9f9eed451176ffcac6b5ba0f6dae1a6b4a1cb0eb (git)
Affected: 1a462be52f4505a2719631fb5aa7bfdbd37bfd8d , < 8703b26387e1fa4f8749db98d24c67617b873acb (git)
Affected: 1a462be52f4505a2719631fb5aa7bfdbd37bfd8d , < cdd412b528dee6e0851c4735d6676ec138da13a4 (git)
Affected: 1a462be52f4505a2719631fb5aa7bfdbd37bfd8d , < b32e40379e5b2814de0c4bc199edc2d82317dc07 (git)
Affected: 1a462be52f4505a2719631fb5aa7bfdbd37bfd8d , < 1f4a08fed450db87fbb5ff5105354158bdbe1a22 (git)
Affected: 5.4.43 , < 5.4.255 (semver)
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Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.4.255 , ≤ 5.4.* (semver)
Unaffected: 5.10.192 , ≤ 5.10.* (semver)
Unaffected: 5.15.128 , ≤ 5.15.* (semver)
Unaffected: 6.1.47 , ≤ 6.1.* (semver)
Unaffected: 6.4.12 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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      "current_release_date": "2026-06-30T10:28:39+00:00",
      "cve": "CVE-2023-53275",
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      "product_status:fixed": "399",
      "product_status:known_affected": "66",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ALSA: hda: fix a possible null-pointer dereference due to data race in snd_hdac_regmap_sync()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53275.json",
      "version": "3"
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                  "baseSeverity": "MEDIUM",
                  "confidentialityImpact": "NONE",
                  "integrityImpact": "NONE",
                  "privilegesRequired": "LOW",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "version": "3.1"
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              {
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                  "content": {
                    "id": "CVE-2023-53275",
                    "options": [
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                      },
                      {
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                    "timestamp": "2026-01-14T18:06:44.564757Z",
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              "dateUpdated": "2026-01-14T18:06:39.218Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
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              "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-\u003eregmap is often protected by the lock\ncodec-\u003eregmap_lock when is accessed. However, it is accessed without\nholding the lock when is accessed in snd_hdac_regmap_sync():\n\n  if (codec-\u003eregmap)\n\nIn my opinion, this may be a harmful race, because if codec-\u003eregmap 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-\u003elock(map-\u003elock_arg); --\u003e 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\u0027s merged\n  as is -- tiwai ]"
            }
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        "cveId": "CVE-2023-53275",
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        "dateReserved": "2025-09-16T08:09:37.990Z",
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  }
}



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