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
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)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
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            "tags": [
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          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
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            "url": "https://git.kernel.org/stable/c/cdd412b528dee6e0851c4735d6676ec138da13a4"
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
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            "type": "Primary"
          },
          {
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                "value": "CWE-476"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
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      "current_release_date": "2026-06-30T10:28:39+00:00",
      "cve": "CVE-2023-53275",
      "id": "CVE-2023-53275",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "399",
      "product_status:known_affected": "66",
      "product_status:known_not_affected": "90",
      "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",
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      "current_release_date": "2026-09-05T00:49:12Z",
      "cve": "CVE-2023-53275",
      "id": "CVE-2023-53275",
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      "product_status:recommended": "565",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53275",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53275.json",
      "version": "56"
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                  "baseScore": 5.5,
                  "baseSeverity": "MEDIUM",
                  "confidentialityImpact": "NONE",
                  "integrityImpact": "NONE",
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                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
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              {
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                      },
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                    "timestamp": "2026-01-14T18:06:44.564757Z",
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              "shortName": "CISA-ADP"
            },
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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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          "title": "ALSA: hda: fix a possible null-pointer dereference due to data race in snd_hdac_regmap_sync()",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.