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CVE-2022-50570 (GCVE-0-2022-50570)

Vulnerability from cvelistv5 – Published: 2025-10-22 13:23 – Updated: 2026-08-05 08:59
VLAI
Title
platform/chrome: fix memory corruption in ioctl
Summary
In the Linux kernel, the following vulnerability has been resolved: platform/chrome: fix memory corruption in ioctl If "s_mem.bytes" is larger than the buffer size it leads to memory corruption.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: eda2e30c6684d67288edb841c6125d48c608a242 , < e548f9503c4b3292a60a63fe77dccea62999a35a (git)
Affected: eda2e30c6684d67288edb841c6125d48c608a242 , < 868fc93b615b9f6c2b0b1894536618fa6cd66acc (git)
Affected: eda2e30c6684d67288edb841c6125d48c608a242 , < fd1d3b265784a2243fcaef06aebfb2f8ee733cec (git)
Affected: eda2e30c6684d67288edb841c6125d48c608a242 , < f143f1d9a8e5c6c9db3de81ca270191226fcce36 (git)
Affected: eda2e30c6684d67288edb841c6125d48c608a242 , < 0c2e18924504208644d18415667895a4ac54cf2a (git)
Affected: eda2e30c6684d67288edb841c6125d48c608a242 , < 8a07b45fd3c2dda24fad43639be5335a4595196a (git)
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Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.4.220 , ≤ 5.4.* (semver)
Unaffected: 5.10.150 , ≤ 5.10.* (semver)
Unaffected: 5.15.75 , ≤ 5.15.* (semver)
Unaffected: 5.19.17 , ≤ 5.19.* (semver)
Unaffected: 6.0.3 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/platform/chrome/cros_ec_chardev.c"
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              "version": "0",
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              "version": "5.19.17",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.3",
              "versionType": "semver"
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              "version": "6.1",
              "versionType": "original_commit_for_fix"
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      ],
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                  "vulnerable": true
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      ],
      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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              "lang": "en",
              "value": "AV:L - The bug is reached only through a local ioctl (CROS_EC_DEV_IOCRDMEM) on the Cros EC misc character device (/dev/cros_ec) via cros_ec_chardev_ioctl \u2192 cros_ec_chardev_ioctl_readmem; it is not reachable from network packet processing or physical bus injection.\nAC:L - An attacker who can open the device fully controls s_mem.bytes/offset and can set bytes \u003e EC_MEMMAP_SIZE (255); unsigned underflow in cros_ec_lpc_readmem\u2019s bounds check then lets cmd_readmem write past the stack buffer with no race or other condition outside the attacker\u2019s control.\nPR:L - Neither open nor the readmem ioctl path checks capabilities\u2014only device-node permissions\u2014and /dev/cros_ec is intended for userspace EC tools, with Chrome OS cros_ec-access group access and Linux deployments that grant udev/uaccess, so real root is not required.\nUI:N - The attacker opens /dev/cros_ec and issues CROS_EC_DEV_IOCRDMEM themselves; no separate victim action such as mounting a filesystem or opening a crafted file is required.\nS:U - Impact is kernel stack memory corruption within the host OS privilege boundary via the platform chrome chardev driver; this is ordinary local kernel compromise, not a VM escape or IOMMU/cross-authority bypass.\nC:H - The out-of-bounds stack write is memory corruption that, per kernel CVSS guidance, can be leveraged for information disclosure and full compromise once control-flow is hijacked.\nI:H - cmd_readmem writes an attacker-chosen number of bytes into the fixed-size s_mem.buffer on the kernel stack (cros_ec_lpc_read_bytes loops length times into dest), producing an out-of-bounds write exploitable for integrity compromise and control-flow hijacking.\nA:H - Stack buffer overflow past s_mem.buffer can oops/panic the kernel (stack canary, corrupted frames, or large I/O reads into kernel stack), which is high availability impact under kernel CVSS guidance."
            }
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:59:10.542Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50570",
    "datePublished": "2025-10-22T13:23:26.495Z",
    "dateReserved": "2025-10-22T13:20:23.760Z",
    "dateUpdated": "2026-08-05T08:59:10.542Z",
    "state": "PUBLISHED"
  },
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:28:10+00:00",
      "cve": "CVE-2022-50570",
      "id": "CVE-2022-50570",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: platform/chrome: fix memory corruption in ioctl",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50570.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T01:24:15Z",
      "cve": "CVE-2022-50570",
      "id": "CVE-2022-50570",
      "initial_release_date": "2025-10-23T00:10:52Z",
      "product_status:known_affected": "354",
      "product_status:known_not_affected": "386",
      "product_status:recommended": "196",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50570",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50570.json",
      "version": "29"
    }
  }
}



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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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