CVE-2022-50049 (GCVE-0-2022-50049)
Vulnerability from cvelistv5
Published
2025-06-18 11:01
Modified
2025-06-18 11:01
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: DPCM: Don't pick up BE without substream When DPCM tries to add valid BE connections at dpcm_add_paths(), it doesn't check whether the picked BE actually supports for the given stream direction. Due to that, when an asymmetric BE stream is present, it picks up wrongly and this may result in a NULL dereference at a later point where the code assumes the existence of a corresponding BE substream. This patch adds the check for the presence of the substream for the target BE for avoiding the problem above. Note that we have already some fix for non-existing BE substream at commit 6246f283d5e0 ("ASoC: dpcm: skip missing substream while applying symmetry"). But the code path we've hit recently is rather happening before the previous fix. So this patch tries to fix at picking up a BE instead of parsing BE lists.
References
Impacted products
Vendor Product Version
Linux Linux Version: c474bb800000d1a93624f6d060e2bba16edf6820
Version: bbf7d3b1c4f40eb02dd1dffb500ba00b0bff0303
Version: bbf7d3b1c4f40eb02dd1dffb500ba00b0bff0303
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/soc/soc-pcm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "aa803e6ecac78e93b24ebefa17c207d6392d8ad4",
              "status": "affected",
              "version": "c474bb800000d1a93624f6d060e2bba16edf6820",
              "versionType": "git"
            },
            {
              "lessThan": "6a840e8ef6b6c56d1b7e6a555adc31135e517875",
              "status": "affected",
              "version": "bbf7d3b1c4f40eb02dd1dffb500ba00b0bff0303",
              "versionType": "git"
            },
            {
              "lessThan": "754590651ccbbcc74a7c20907be4bb15d642bde3",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "sound/soc/soc-pcm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.17"
            },
            {
              "lessThan": "5.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.4",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: DPCM: Don\u0027t pick up BE without substream\n\nWhen DPCM tries to add valid BE connections at dpcm_add_paths(), it\ndoesn\u0027t check whether the picked BE actually supports for the given\nstream direction.  Due to that, when an asymmetric BE stream is\npresent, it picks up wrongly and this may result in a NULL dereference\nat a later point where the code assumes the existence of a\ncorresponding BE substream.\n\nThis patch adds the check for the presence of the substream for the\ntarget BE for avoiding the problem above.\n\nNote that we have already some fix for non-existing BE substream at\ncommit 6246f283d5e0 (\"ASoC: dpcm: skip missing substream while\napplying symmetry\").  But the code path we\u0027ve hit recently is rather\nhappening before the previous fix.  So this patch tries to fix at\npicking up a BE instead of parsing BE lists."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T11:01:49.810Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/aa803e6ecac78e93b24ebefa17c207d6392d8ad4"
        },
        {
          "url": "https://git.kernel.org/stable/c/6a840e8ef6b6c56d1b7e6a555adc31135e517875"
        },
        {
          "url": "https://git.kernel.org/stable/c/754590651ccbbcc74a7c20907be4bb15d642bde3"
        }
      ],
      "title": "ASoC: DPCM: Don\u0027t pick up BE without substream",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50049",
    "datePublished": "2025-06-18T11:01:49.810Z",
    "dateReserved": "2025-06-18T10:57:27.402Z",
    "dateUpdated": "2025-06-18T11:01:49.810Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50049\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:33.500\",\"lastModified\":\"2025-06-18T13:47:40.833\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nASoC: DPCM: Don\u0027t pick up BE without substream\\n\\nWhen DPCM tries to add valid BE connections at dpcm_add_paths(), it\\ndoesn\u0027t check whether the picked BE actually supports for the given\\nstream direction.  Due to that, when an asymmetric BE stream is\\npresent, it picks up wrongly and this may result in a NULL dereference\\nat a later point where the code assumes the existence of a\\ncorresponding BE substream.\\n\\nThis patch adds the check for the presence of the substream for the\\ntarget BE for avoiding the problem above.\\n\\nNote that we have already some fix for non-existing BE substream at\\ncommit 6246f283d5e0 (\\\"ASoC: dpcm: skip missing substream while\\napplying symmetry\\\").  But the code path we\u0027ve hit recently is rather\\nhappening before the previous fix.  So this patch tries to fix at\\npicking up a BE instead of parsing BE lists.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ASoC: DPCM: No seleccionar BE sin subflujo. Cuando DPCM intenta agregar conexiones BE v\u00e1lidas en dpcm_add_paths(), no comprueba si el BE seleccionado realmente admite la direcci\u00f3n de flujo dada. Debido a eso, cuando hay un flujo BE asim\u00e9trico presente, se selecciona incorrectamente y esto puede resultar en una desreferencia NULL en un punto posterior donde el c\u00f3digo asume la existencia de un subflujo BE correspondiente. Este parche agrega la verificaci\u00f3n de la presencia del subflujo para el BE de destino para evitar el problema mencionado anteriormente. Tenga en cuenta que ya tenemos una correcci\u00f3n para el subflujo BE inexistente en el commit 6246f283d5e0 (\\\"ASoC: dpcm: omitir subflujo faltante al aplicar simetr\u00eda\\\"). Pero la ruta de c\u00f3digo que hemos alcanzado recientemente est\u00e1 sucediendo antes de la correcci\u00f3n anterior. Por lo tanto, este parche intenta corregir al seleccionar un BE en lugar de analizar listas de BE.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/6a840e8ef6b6c56d1b7e6a555adc31135e517875\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/754590651ccbbcc74a7c20907be4bb15d642bde3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aa803e6ecac78e93b24ebefa17c207d6392d8ad4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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