CVE-2026-68403 (GCVE-0-2026-68403)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:04 – Updated: 2026-08-19 16:34
VLAI
Title
wifi: brcmfmac: initialize SDIO data work before cleanup
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9982464379e81ece51ced03ebecbbcd34ea367a6 , < 860887d22890417d43ef8298f0cc4865e29b54de (git)
Affected: 9982464379e81ece51ced03ebecbbcd34ea367a6 , < 9a4be91e5bb032b34cb3c962f6d4f82e7ef09364 (git)
Affected: 9982464379e81ece51ced03ebecbbcd34ea367a6 , < fb12c87ae855346321af72e57a93c146205f1090 (git)
Affected: 9982464379e81ece51ced03ebecbbcd34ea367a6 , < f50a2b9e57a751e70ae9a272875d80d39eaccd6a (git)
Affected: 9982464379e81ece51ced03ebecbbcd34ea367a6 , < 6bd21ec8549a5854dd64204a66289952917a924c (git)
Affected: 9982464379e81ece51ced03ebecbbcd34ea367a6 , < 5c342437ea44bb829680ca9e4f683dd5b325b219 (git)
Affected: 9982464379e81ece51ced03ebecbbcd34ea367a6 , < c73c3fc1c7ca5a927639f0884624cb244ba791e4 (git)
Affected: 9982464379e81ece51ced03ebecbbcd34ea367a6 , < 2a665946e0407a05a3f81bd56a08553c446498e0 (git)
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Linux Linux Affected: 4.1
Unaffected: 0 , < 4.1 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "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."
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    "datePublished": "2026-08-10T12:04:23.150Z",
    "dateReserved": "2026-07-30T09:28:09.390Z",
    "dateUpdated": "2026-08-19T16:34:54.805Z",
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-11T15:33:41+00:00",
      "cve": "CVE-2026-68403",
      "id": "CVE-2026-68403",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: brcmfmac: initialize SDIO data work before cleanup",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68403.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-13T16:22:14Z",
      "cve": "CVE-2026-68403",
      "id": "CVE-2026-68403",
      "initial_release_date": "2026-08-13T16:22:14Z",
      "product_status:known_affected": "193",
      "product_status:known_not_affected": "103",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68403",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68403.json",
      "version": "2"
    }
  }
}



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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.

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


Detection rules are retrieved from Rulezet.