CVE-2022-50028 (GCVE-0-2022-50028)
Vulnerability from cvelistv5
Published
2025-06-18 11:01
Modified
2026-08-05 08:57
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: gadgetfs: ep_io - wait until IRQ finishes after usb_ep_queue() if wait_for_completion_interruptible() is interrupted we need to wait until IRQ gets finished. Otherwise complete() from epio_complete() can corrupt stack.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/legacy/inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "67a4874461422e633236a0286a01b483cd647113",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "118d967ce00a3d128bf731b35e4e2cb0facf5f00",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "77040efe59a141286d090c8a0d37c65a355a1832",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "ca06b4cde54f8ec8be3aa53fd339bd56e62c12b3",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "9ac14f973cb91f0c01776517e6d50981f32b8038",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "94aadba8d000d5de56af4ce8da3f334f21bf7a79",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "04cb742d4d8f30dc2e83b46ac317eec09191c68e",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/legacy/inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.326",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.291",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.256",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.211",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.138",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.63",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.326",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.291",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.256",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.211",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.138",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.63",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.4",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngadgetfs: ep_io - wait until IRQ finishes\n\nafter usb_ep_queue() if wait_for_completion_interruptible() is\ninterrupted we need to wait until IRQ gets finished.\n\nOtherwise complete() from epio_complete() can corrupt stack."
        }
      ],
      "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 bug is in gadgetfs synchronous endpoint read/write (`ep_io` via `ep_read_iter`/`ep_write_iter` on `/dev/gadget/ep*`), a local syscall/file-descriptor path. It is not reached by USB host packet processing; prior gadgetfs/FunctionFS API bugs (e.g. CVE-2024-35815, CVE-2024-36894) are scored Local for the same reason.\nAC:L - The attacker controls both sides of the race: they drive sync ep I/O, deliver a signal to interrupt `wait_for_completion_interruptible()`, and can force endpoint teardown (e.g. close ep0 \u2192 `usb_gadget_unregister_driver` \u2192 `destroy_ep_files`). No condition outside attacker influence is required.\nPR:L - Gadgetfs endpoint nodes are created with configurable `default_uid`/`default_gid`/`default_perm`, and realistic gadget deployments (Android/embedded USB gadget daemons) expose ep files to unprivileged service uids, matching FunctionFS `uid=`/`gid=`/`fmode=` precedent. No init-namespace root is required once those nodes are openable.\nUI:N - The attacker opens the endpoint file, issues read/write, signals their own wait, and triggers teardown themselves. No separate victim action (mount, confirm, or open) is required beyond an already-active gadget deployment.\nS:U - Stack corruption from `complete()` on the freed on-stack completion stays within the same host kernel security authority. This is standard local kernel memory corruption, not a VM escape, IOMMU bypass, or sandbox boundary cross.\nC:H - `epio_complete()` calling `complete()` on a returned `DECLARE_COMPLETION_ONSTACK` writes into reused kernel stack memory; that stack use-after-free is memory corruption that can be leveraged for kernel information disclosure under CNA guidance.\nI:H - `complete()` performs locked writes (`done++`, waiter wakeups) into whatever reused the stack frame, corrupting kernel stack control/data state and enabling control-flow hijack. Out-of-lifetime stack writes are scored High integrity.\nA:H - Completing into freed stack reliably corrupts stack frames or hits hardening checks, causing kernel oops/panic. The attacker can retrigger the interrupt-and-teardown sequence for sustained denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:57:11.979Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/67a4874461422e633236a0286a01b483cd647113"
        },
        {
          "url": "https://git.kernel.org/stable/c/118d967ce00a3d128bf731b35e4e2cb0facf5f00"
        },
        {
          "url": "https://git.kernel.org/stable/c/77040efe59a141286d090c8a0d37c65a355a1832"
        },
        {
          "url": "https://git.kernel.org/stable/c/ca06b4cde54f8ec8be3aa53fd339bd56e62c12b3"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ac14f973cb91f0c01776517e6d50981f32b8038"
        },
        {
          "url": "https://git.kernel.org/stable/c/94aadba8d000d5de56af4ce8da3f334f21bf7a79"
        },
        {
          "url": "https://git.kernel.org/stable/c/2b06d5d97c0e067108a122986767731d40742138"
        },
        {
          "url": "https://git.kernel.org/stable/c/04cb742d4d8f30dc2e83b46ac317eec09191c68e"
        }
      ],
      "title": "gadgetfs: ep_io - wait until IRQ finishes",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50028",
    "datePublished": "2025-06-18T11:01:31.293Z",
    "dateReserved": "2025-06-18T10:57:27.394Z",
    "dateUpdated": "2026-08-05T08:57:11.979Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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