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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6a840e8ef6b6c56d1b7e6a555adc31135e517875
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/754590651ccbbcc74a7c20907be4bb15d642bde3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aa803e6ecac78e93b24ebefa17c207d6392d8ad4
Impacted products
Vendor Product Version
Linux Linux Version: c474bb800000d1a93624f6d060e2bba16edf6820
Version: bbf7d3b1c4f40eb02dd1dffb500ba00b0bff0303
Version: bbf7d3b1c4f40eb02dd1dffb500ba00b0bff0303
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   Linux Linux Version: 5.17
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{
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          "programFiles": [
            "sound/soc/soc-pcm.c"
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      "descriptions": [
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          "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"
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        },
        {
          "url": "https://git.kernel.org/stable/c/754590651ccbbcc74a7c20907be4bb15d642bde3"
        }
      ],
      "title": "ASoC: DPCM: Don\u0027t pick up BE without substream",
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    "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",
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  "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.\"}],\"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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