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FKIE_CVE-2022-50846

Vulnerability from fkie_nvd - Published: 2025-12-30 13:15 - Updated: 2026-06-17 05:24
Severity
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().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/076bcd2c93e16b05c10564e299d6e5d26a766d00
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0959cc1685eb19774300d43ef25e318b457b156b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0ec94795114edc7e24ec71849dce42bfa61dafa3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/12b8e81b77c05c658efd9cde3585bbd65ae39b59
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/63400da6cd37a9793c19bb6aed7131b58b975a04
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/95025a8dd0ec015872f6c16473fe04d6264e68ca
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ba91b413983a9235792523c6b9f7ba2586c4d75d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e4e46fb61e3bb4628170810d3f2b996b709b90d9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f59ef2a47a228e51322ad76752a55a8917c56e38
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "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": [
            {
              "lessThan": "076bcd2c93e16b05c10564e299d6e5d26a766d00",
              "status": "affected",
              "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
              "versionType": "git"
            },
            {
              "lessThan": "12b8e81b77c05c658efd9cde3585bbd65ae39b59",
              "status": "affected",
              "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
              "versionType": "git"
            },
            {
              "lessThan": "95025a8dd0ec015872f6c16473fe04d6264e68ca",
              "status": "affected",
              "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
              "versionType": "git"
            },
            {
              "lessThan": "f59ef2a47a228e51322ad76752a55a8917c56e38",
              "status": "affected",
              "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
              "versionType": "git"
            },
            {
              "lessThan": "63400da6cd37a9793c19bb6aed7131b58b975a04",
              "status": "affected",
              "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
              "versionType": "git"
            },
            {
              "lessThan": "0959cc1685eb19774300d43ef25e318b457b156b",
              "status": "affected",
              "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
              "versionType": "git"
            },
            {
              "lessThan": "0ec94795114edc7e24ec71849dce42bfa61dafa3",
              "status": "affected",
              "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
              "versionType": "git"
            },
            {
              "lessThan": "ba91b413983a9235792523c6b9f7ba2586c4d75d",
              "status": "affected",
              "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
              "versionType": "git"
            },
            {
              "lessThan": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
              "status": "affected",
              "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
              "versionType": "git"
            }
          ]
        },
        {
          "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": [
            {
              "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",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.229",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "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()."
    }
  ],
  "id": "CVE-2022-50846",
  "lastModified": "2026-06-17T05:24:17.267",
  "metrics": {},
  "published": "2025-12-30T13:15:59.243",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



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