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

Vulnerability from cvelistv5 – Published: 2025-12-30 12:11 – Updated: 2026-05-11 19:26
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 CPE status
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)
guessed Create a notification for this product.
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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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
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      "descriptions": [
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          "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()."
        }
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      "providerMetadata": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/076bcd2c93e16b05c10564e299d6e5d26a766d00"
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          "url": "https://git.kernel.org/stable/c/12b8e81b77c05c658efd9cde3585bbd65ae39b59"
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          "url": "https://git.kernel.org/stable/c/e4e46fb61e3bb4628170810d3f2b996b709b90d9"
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      ],
      "title": "mmc: via-sdmmc: fix return value check of mmc_add_host()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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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": "2026-05-11T19:26:14.924Z",
    "state": "PUBLISHED"
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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().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/mmc/host/via-sdmmc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f0bf7f61b8405224bc52fc9a3ccd167a68126e00\",\"lessThan\":\"076bcd2c93e16b05c10564e299d6e5d26a766d00\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f0bf7f61b8405224bc52fc9a3ccd167a68126e00\",\"lessThan\":\"12b8e81b77c05c658efd9cde3585bbd65ae39b59\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f0bf7f61b8405224bc52fc9a3ccd167a68126e00\",\"lessThan\":\"95025a8dd0ec015872f6c16473fe04d6264e68ca\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f0bf7f61b8405224bc52fc9a3ccd167a68126e00\",\"lessThan\":\"f59ef2a47a228e51322ad76752a55a8917c56e38\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f0bf7f61b8405224bc52fc9a3ccd167a68126e00\",\"lessThan\":\"63400da6cd37a9793c19bb6aed7131b58b975a04\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f0bf7f61b8405224bc52fc9a3ccd167a68126e00\",\"lessThan\":\"0959cc1685eb19774300d43ef25e318b457b156b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f0bf7f61b8405224bc52fc9a3ccd167a68126e00\",\"lessThan\":\"0ec94795114edc7e24ec71849dce42bfa61dafa3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f0bf7f61b8405224bc52fc9a3ccd167a68126e00\",\"lessThan\":\"ba91b413983a9235792523c6b9f7ba2586c4d75d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f0bf7f61b8405224bc52fc9a3ccd167a68126e00\",\"lessThan\":\"e4e46fb61e3bb4628170810d3f2b996b709b90d9\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/mmc/host/via-sdmmc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.31\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.31\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.9.337\",\"lessThanOrEqual\":\"4.9.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.14.303\",\"lessThanOrEqual\":\"4.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.270\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.229\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.163\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.86\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.0.16\",\"lessThanOrEqual\":\"6.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.2\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"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\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:38:23+00:00",
      "cve": "CVE-2022-50846",
      "id": "CVE-2022-50846",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "280",
      "product_status:known_affected": "36",
      "product_status:known_not_affected": "160",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mmc: via-sdmmc: fix return value check of mmc_add_host()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50846.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T01:23:29Z",
      "cve": "CVE-2022-50846",
      "id": "CVE-2022-50846",
      "initial_release_date": "2025-12-31T00:31:25Z",
      "product_status:known_affected": "475",
      "product_status:known_not_affected": "172",
      "product_status:recommended": "196",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50846",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50846.json",
      "version": "28"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • 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.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.


Detection rules are retrieved from Rulezet.


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