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FKIE_CVE-2026-68403

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-19 17:20
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: initialize SDIO data work before cleanup brcmf_sdio_probe() stores the newly allocated bus in sdiodev->bus before allocating the ordered workqueue. If that allocation fails, the function jumps to fail and calls brcmf_sdio_remove(). brcmf_sdio_remove() unconditionally cancels bus->datawork. Initialize the work item before the first failure path that can reach brcmf_sdio_remove(), so the cleanup path always observes a valid work object. This issue was found by our static analysis tool and then confirmed by manual review of the probe error path and the remove-time work drain. The problem pattern is an early setup failure that reaches a cleanup helper which cancels an embedded work item before its initializer has run. A QEMU PoC forced alloc_ordered_workqueue() to fail at the same point in brcmf_sdio_probe(), before INIT_WORK(&bus->datawork) is reached. The resulting fail path calls brcmf_sdio_remove(), and DEBUG_OBJECTS reports the invalid work drain with brcmf_sdio_probe() and brcmf_sdio_remove() in the stack.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2a665946e0407a05a3f81bd56a08553c446498e0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5c342437ea44bb829680ca9e4f683dd5b325b219
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6bd21ec8549a5854dd64204a66289952917a924c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/860887d22890417d43ef8298f0cc4865e29b54de
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a4be91e5bb032b34cb3c962f6d4f82e7ef09364
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c73c3fc1c7ca5a927639f0884624cb244ba791e4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f50a2b9e57a751e70ae9a272875d80d39eaccd6a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fb12c87ae855346321af72e57a93c146205f1090
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "860887d22890417d43ef8298f0cc4865e29b54de",
              "status": "affected",
              "version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
              "versionType": "git"
            },
            {
              "lessThan": "9a4be91e5bb032b34cb3c962f6d4f82e7ef09364",
              "status": "affected",
              "version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
              "versionType": "git"
            },
            {
              "lessThan": "fb12c87ae855346321af72e57a93c146205f1090",
              "status": "affected",
              "version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
              "versionType": "git"
            },
            {
              "lessThan": "f50a2b9e57a751e70ae9a272875d80d39eaccd6a",
              "status": "affected",
              "version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
              "versionType": "git"
            },
            {
              "lessThan": "6bd21ec8549a5854dd64204a66289952917a924c",
              "status": "affected",
              "version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
              "versionType": "git"
            },
            {
              "lessThan": "5c342437ea44bb829680ca9e4f683dd5b325b219",
              "status": "affected",
              "version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
              "versionType": "git"
            },
            {
              "lessThan": "c73c3fc1c7ca5a927639f0884624cb244ba791e4",
              "status": "affected",
              "version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
              "versionType": "git"
            },
            {
              "lessThan": "2a665946e0407a05a3f81bd56a08553c446498e0",
              "status": "affected",
              "version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.1"
            },
            {
              "lessThan": "4.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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\nwifi: brcmfmac: initialize SDIO data work before cleanup\n\nbrcmf_sdio_probe() stores the newly allocated bus in sdiodev-\u003ebus before\nallocating the ordered workqueue. If that allocation fails, the function\njumps to fail and calls brcmf_sdio_remove().\n\nbrcmf_sdio_remove() unconditionally cancels bus-\u003edatawork. Initialize the\nwork item before the first failure path that can reach brcmf_sdio_remove(),\nso the cleanup path always observes a valid work object.\n\nThis issue was found by our static analysis tool and then confirmed by\nmanual review of the probe error path and the remove-time work drain. The\nproblem pattern is an early setup failure that reaches a cleanup helper\nwhich cancels an embedded work item before its initializer has run.\n\nA QEMU PoC forced alloc_ordered_workqueue() to fail at the same point in\nbrcmf_sdio_probe(), before INIT_WORK(\u0026bus-\u003edatawork) is reached. The\nresulting fail path calls brcmf_sdio_remove(), and DEBUG_OBJECTS reports\nthe invalid work drain with brcmf_sdio_probe() and brcmf_sdio_remove() in\nthe stack."
    }
  ],
  "id": "CVE-2026-68403",
  "lastModified": "2026-08-19T17:20:48.187",
  "metrics": {},
  "published": "2026-08-10T13:20:33.830",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2a665946e0407a05a3f81bd56a08553c446498e0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5c342437ea44bb829680ca9e4f683dd5b325b219"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6bd21ec8549a5854dd64204a66289952917a924c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/860887d22890417d43ef8298f0cc4865e29b54de"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9a4be91e5bb032b34cb3c962f6d4f82e7ef09364"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c73c3fc1c7ca5a927639f0884624cb244ba791e4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f50a2b9e57a751e70ae9a272875d80d39eaccd6a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fb12c87ae855346321af72e57a93c146205f1090"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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