CVE-2025-38078 (GCVE-0-2025-38078)
Vulnerability from cvelistv5
Published
2025-06-18 09:33
Modified
2025-06-18 09:33
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix race of buffer access at PCM OSS layer The PCM OSS layer tries to clear the buffer with the silence data at initialization (or reconfiguration) of a stream with the explicit call of snd_pcm_format_set_silence() with runtime->dma_area. But this may lead to a UAF because the accessed runtime->dma_area might be freed concurrently, as it's performed outside the PCM ops. For avoiding it, move the code into the PCM core and perform it inside the buffer access lock, so that it won't be changed during the operation.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/sound/pcm.h",
            "sound/core/oss/pcm_oss.c",
            "sound/core/pcm_native.c"
          ],
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
              "version": "5.4.294",
              "versionType": "semver"
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              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.238",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "5.15.185",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.1.141",
              "versionType": "semver"
            },
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              "version": "6.6.93",
              "versionType": "semver"
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              "version": "6.12.31",
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            {
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              "version": "6.14.9",
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            },
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              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: pcm: Fix race of buffer access at PCM OSS layer\n\nThe PCM OSS layer tries to clear the buffer with the silence data at\ninitialization (or reconfiguration) of a stream with the explicit call\nof snd_pcm_format_set_silence() with runtime-\u003edma_area.  But this may\nlead to a UAF because the accessed runtime-\u003edma_area might be freed\nconcurrently, as it\u0027s performed outside the PCM ops.\n\nFor avoiding it, move the code into the PCM core and perform it inside\nthe buffer access lock, so that it won\u0027t be changed during the\noperation."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T09:33:52.644Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c0e05a76fc727929524ef24a19c302e6dd40233f"
        },
        {
          "url": "https://git.kernel.org/stable/c/8170d8ec4efd0be352c14cb61f374e30fb0c2a25"
        },
        {
          "url": "https://git.kernel.org/stable/c/10217da9644ae75cea7330f902c35fc5ba78bbbf"
        },
        {
          "url": "https://git.kernel.org/stable/c/f3e14d706ec18faf19f5a6e75060e140fea05d4a"
        },
        {
          "url": "https://git.kernel.org/stable/c/74d90875f3d43f3eff0e9861c4701418795d3455"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf85e49aaf3a3c5775ea87369ea5f159c2148db4"
        },
        {
          "url": "https://git.kernel.org/stable/c/afa56c960fcb4db37f2e3399f28e9402e4e1f470"
        },
        {
          "url": "https://git.kernel.org/stable/c/93a81ca0657758b607c3f4ba889ae806be9beb73"
        }
      ],
      "title": "ALSA: pcm: Fix race of buffer access at PCM OSS layer",
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38078",
    "datePublished": "2025-06-18T09:33:52.644Z",
    "dateReserved": "2025-04-16T04:51:23.980Z",
    "dateUpdated": "2025-06-18T09:33:52.644Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38078\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T10:15:41.380\",\"lastModified\":\"2025-06-18T13:46:52.973\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nALSA: pcm: Fix race of buffer access at PCM OSS layer\\n\\nThe PCM OSS layer tries to clear the buffer with the silence data at\\ninitialization (or reconfiguration) of a stream with the explicit call\\nof snd_pcm_format_set_silence() with runtime-\u003edma_area.  But this may\\nlead to a UAF because the accessed runtime-\u003edma_area might be freed\\nconcurrently, as it\u0027s performed outside the PCM ops.\\n\\nFor avoiding it, move the code into the PCM core and perform it inside\\nthe buffer access lock, so that it won\u0027t be changed during the\\noperation.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: pcm: Correcci\u00f3n de la ejecuci\u00f3n de acceso al b\u00fafer en la capa PCM OSS. La capa PCM OSS intenta borrar el b\u00fafer con los datos de silencio durante la inicializaci\u00f3n (o reconfiguraci\u00f3n) de un flujo mediante la llamada expl\u00edcita a snd_pcm_format_set_silence() con runtime-\u0026gt;dma_area. Sin embargo, esto puede generar una UAF, ya que el acceso a runtime-\u0026gt;dma_area podr\u00eda liberarse simult\u00e1neamente, ya que se realiza fuera de las operaciones PCM. Para evitarlo, mueva el c\u00f3digo al n\u00facleo PCM y ejec\u00fatelo dentro del bloqueo de acceso al b\u00fafer, de modo que no se modifique durante la operaci\u00f3n. \"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/10217da9644ae75cea7330f902c35fc5ba78bbbf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/74d90875f3d43f3eff0e9861c4701418795d3455\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8170d8ec4efd0be352c14cb61f374e30fb0c2a25\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/93a81ca0657758b607c3f4ba889ae806be9beb73\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/afa56c960fcb4db37f2e3399f28e9402e4e1f470\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bf85e49aaf3a3c5775ea87369ea5f159c2148db4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c0e05a76fc727929524ef24a19c302e6dd40233f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f3e14d706ec18faf19f5a6e75060e140fea05d4a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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