CVE-2022-50623 (GCVE-0-2022-50623)
Vulnerability from cvelistv5
Published
2025-12-08 01:16
Modified
2026-08-05 08:59
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: fpga: prevent integer overflow in dfl_feature_ioctl_set_irq() The "hdr.count * sizeof(s32)" multiplication can overflow on 32 bit systems leading to memory corruption. Use array_size() to fix that.
References
Impacted products
Vendor Product Version
Linux Linux Version: 322b598be4d9b9090cda560c4caab78704615ab4
Version: 322b598be4d9b9090cda560c4caab78704615ab4
Version: 322b598be4d9b9090cda560c4caab78704615ab4
Version: 322b598be4d9b9090cda560c4caab78704615ab4
Version: 322b598be4d9b9090cda560c4caab78704615ab4
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/fpga/dfl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f59861946fa51bcc1f305809e4ebc1013b0ee61c",
              "status": "affected",
              "version": "322b598be4d9b9090cda560c4caab78704615ab4",
              "versionType": "git"
            },
            {
              "lessThan": "b94605f5cb99e90c8ca91523597a40e1bd59546b",
              "status": "affected",
              "version": "322b598be4d9b9090cda560c4caab78704615ab4",
              "versionType": "git"
            },
            {
              "lessThan": "1b5a931594f7ffd26d706614c37d4da0f2ffb6e7",
              "status": "affected",
              "version": "322b598be4d9b9090cda560c4caab78704615ab4",
              "versionType": "git"
            },
            {
              "lessThan": "940253af8b3865b76de8d1b46bcd4a700104852e",
              "status": "affected",
              "version": "322b598be4d9b9090cda560c4caab78704615ab4",
              "versionType": "git"
            },
            {
              "lessThan": "939bc5453b8cbdde9f1e5110ce8309aedb1b501a",
              "status": "affected",
              "version": "322b598be4d9b9090cda560c4caab78704615ab4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/fpga/dfl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.9"
            },
            {
              "lessThan": "5.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.150",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.150",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.75",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.17",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.3",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfpga: prevent integer overflow in dfl_feature_ioctl_set_irq()\n\nThe \"hdr.count * sizeof(s32)\" multiplication can overflow on 32 bit\nsystems leading to memory corruption.  Use array_size() to fix that."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "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"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerability is reached via ioctl on local DFL character devices (/dev/dfl-port.* or /dev/dfl-fme.*) through afu_ioctl/fme_ioctl into dfl_feature_ioctl_set_irq(); it is not reachable from network packet processing or physical bus injection.\nAC:L - An attacker who can open the device fully controls hdr.start/hdr.count and the eventfd array and can issue the SET_IRQ ioctl directly; triggering the overflow path does not depend on a race or other conditions outside the attacker\u2019s influence.\nPR:L - Neither open nor the SET_IRQ ioctl path checks capabilities\u2014only device-node permissions\u2014and DFL ports/AFUs are explicitly intended for userspace applications, including SR-IOV VF tenants and deployments that grant group access via udev, so real root is not required.\nUI:N - The attacker opens the DFL device and issues DFL_FPGA_*_SET_IRQ themselves; no separate victim action such as mounting a filesystem or opening a crafted file is required.\nS:U - Impact is memory corruption within the host (or guest, under VF passthrough) kernel\u2019s DFL driver privilege boundary; this is ordinary local kernel compromise, not a VM escape or IOMMU/cross-authority bypass.\nC:H - The integer overflow causes memdup_user() to allocate an undersized buffer while the code still iterates hdr.count entries, producing an out-of-bounds kernel heap read of the fds array that can be leveraged for information disclosure under memory-corruption guidance.\nI:H - The commit documents memory corruption from the wrapped allocation size; an undersized heap object consumed as a large fd array is exploitable for integrity compromise and control-flow impact consistent with kernel scoring of similar memdup_user overflows.\nA:H - Out-of-bounds access of the undersized fds buffer can oops/panic the kernel (including KASAN or unmapped heap pages), which is high availability impact under kernel CVSS guidance."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:59:12.762Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f59861946fa51bcc1f305809e4ebc1013b0ee61c"
        },
        {
          "url": "https://git.kernel.org/stable/c/b94605f5cb99e90c8ca91523597a40e1bd59546b"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b5a931594f7ffd26d706614c37d4da0f2ffb6e7"
        },
        {
          "url": "https://git.kernel.org/stable/c/940253af8b3865b76de8d1b46bcd4a700104852e"
        },
        {
          "url": "https://git.kernel.org/stable/c/939bc5453b8cbdde9f1e5110ce8309aedb1b501a"
        }
      ],
      "title": "fpga: prevent integer overflow in dfl_feature_ioctl_set_irq()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50623",
    "datePublished": "2025-12-08T01:16:37.086Z",
    "dateReserved": "2025-12-08T01:14:55.190Z",
    "dateUpdated": "2026-08-05T08:59:12.762Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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