CVE-2022-50846 (GCVE-0-2022-50846)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:11 – Updated: 2025-12-30 12:11
VLAI?
Title
mmc: via-sdmmc: fix return value check of mmc_add_host()
Summary
In the Linux kernel, the following vulnerability has been resolved: mmc: via-sdmmc: fix return value check of mmc_add_host() mmc_add_host() may return error, if we ignore its return value, it will lead two issues: 1. The memory that allocated in mmc_alloc_host() is leaked. 2. In the remove() path, mmc_remove_host() will be called to delete device, but it's not added yet, it will lead a kernel crash because of null-ptr-deref in device_del(). Fix this by checking the return value and goto error path which will call mmc_free_host().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < 076bcd2c93e16b05c10564e299d6e5d26a766d00 (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < 12b8e81b77c05c658efd9cde3585bbd65ae39b59 (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < 95025a8dd0ec015872f6c16473fe04d6264e68ca (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < f59ef2a47a228e51322ad76752a55a8917c56e38 (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < 63400da6cd37a9793c19bb6aed7131b58b975a04 (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < 0959cc1685eb19774300d43ef25e318b457b156b (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < 0ec94795114edc7e24ec71849dce42bfa61dafa3 (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < ba91b413983a9235792523c6b9f7ba2586c4d75d (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < e4e46fb61e3bb4628170810d3f2b996b709b90d9 (git)
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    Linux Linux Affected: 2.6.31
Unaffected: 0 , < 2.6.31 (semver)
Unaffected: 4.9.337 , ≤ 4.9.* (semver)
Unaffected: 4.14.303 , ≤ 4.14.* (semver)
Unaffected: 4.19.270 , ≤ 4.19.* (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/mmc/host/via-sdmmc.c"
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        },
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          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/mmc/host/via-sdmmc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "2.6.31"
            },
            {
              "lessThan": "2.6.31",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.337",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.303",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.270",
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            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.229",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
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          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: via-sdmmc: fix return value check of mmc_add_host()\n\nmmc_add_host() may return error, if we ignore its return value,\nit will lead two issues:\n1. The memory that allocated in mmc_alloc_host() is leaked.\n2. In the remove() path, mmc_remove_host() will be called to\n   delete device, but it\u0027s not added yet, it will lead a kernel\n   crash because of null-ptr-deref in device_del().\n\nFix this by checking the return value and goto error path which\nwill call mmc_free_host()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-30T12:11:03.286Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/076bcd2c93e16b05c10564e299d6e5d26a766d00"
        },
        {
          "url": "https://git.kernel.org/stable/c/12b8e81b77c05c658efd9cde3585bbd65ae39b59"
        },
        {
          "url": "https://git.kernel.org/stable/c/95025a8dd0ec015872f6c16473fe04d6264e68ca"
        },
        {
          "url": "https://git.kernel.org/stable/c/f59ef2a47a228e51322ad76752a55a8917c56e38"
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        },
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          "url": "https://git.kernel.org/stable/c/ba91b413983a9235792523c6b9f7ba2586c4d75d"
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        {
          "url": "https://git.kernel.org/stable/c/e4e46fb61e3bb4628170810d3f2b996b709b90d9"
        }
      ],
      "title": "mmc: via-sdmmc: fix return value check of mmc_add_host()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50846",
    "datePublished": "2025-12-30T12:11:03.286Z",
    "dateReserved": "2025-12-30T12:06:07.134Z",
    "dateUpdated": "2025-12-30T12:11:03.286Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50846\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-30T13:15:59.243\",\"lastModified\":\"2025-12-30T13:15:59.243\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmmc: via-sdmmc: fix return value check of mmc_add_host()\\n\\nmmc_add_host() may return error, if we ignore its return value,\\nit will lead two issues:\\n1. The memory that allocated in mmc_alloc_host() is leaked.\\n2. In the remove() path, mmc_remove_host() will be called to\\n   delete device, but it\u0027s not added yet, it will lead a kernel\\n   crash because of null-ptr-deref in device_del().\\n\\nFix this by checking the return value and goto error path which\\nwill call mmc_free_host().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/076bcd2c93e16b05c10564e299d6e5d26a766d00\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0959cc1685eb19774300d43ef25e318b457b156b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0ec94795114edc7e24ec71849dce42bfa61dafa3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/12b8e81b77c05c658efd9cde3585bbd65ae39b59\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/63400da6cd37a9793c19bb6aed7131b58b975a04\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/95025a8dd0ec015872f6c16473fe04d6264e68ca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ba91b413983a9235792523c6b9f7ba2586c4d75d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e4e46fb61e3bb4628170810d3f2b996b709b90d9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f59ef2a47a228e51322ad76752a55a8917c56e38\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • 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.
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  • 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.



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