{"id":"CVE-2026-68403","title":"wifi: brcmfmac: initialize SDIO data work before cleanup","summary":"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->bus before\nallocating the ordered workqueue. If …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < 860887d22890417d43ef8298f0cc4865e29b54de","Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < 9a4be91e5bb032b34cb3c962f6d4f82e7ef09364","Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < fb12c87ae855346321af72e57a93c146205f1090","Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < f50a2b9e57a751e70ae9a272875d80d39eaccd6a","Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < 6bd21ec8549a5854dd64204a66289952917a924c","Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < 5c342437ea44bb829680ca9e4f683dd5b325b219","Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < c73c3fc1c7ca5a927639f0884624cb244ba791e4","Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < 2a665946e0407a05a3f81bd56a08553c446498e0","Linux 4.1"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:48:39.275130Z"},"published":"2026-08-10","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:55:15.413Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68403","references":[{"url":"https://git.kernel.org/stable/c/860887d22890417d43ef8298f0cc4865e29b54de"},{"url":"https://git.kernel.org/stable/c/9a4be91e5bb032b34cb3c962f6d4f82e7ef09364"},{"url":"https://git.kernel.org/stable/c/fb12c87ae855346321af72e57a93c146205f1090"},{"url":"https://git.kernel.org/stable/c/f50a2b9e57a751e70ae9a272875d80d39eaccd6a"},{"url":"https://git.kernel.org/stable/c/6bd21ec8549a5854dd64204a66289952917a924c"},{"url":"https://git.kernel.org/stable/c/5c342437ea44bb829680ca9e4f683dd5b325b219"},{"url":"https://git.kernel.org/stable/c/c73c3fc1c7ca5a927639f0884624cb244ba791e4"},{"url":"https://git.kernel.org/stable/c/2a665946e0407a05a3f81bd56a08553c446498e0"}],"tags":["cve.org"],"epss":0.00177,"epssPercentile":0.0725,"ingestedAt":"2026-11-06T18:00:12.605Z","slug":"CVE-2026-68403","body":"## Overview\n\nIn 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->bus 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->datawork. 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(&bus->datawork) 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.\n\n## Affected\n\n- `Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < 860887d22890417d43ef8298f0cc4865e29b54de`\n- `Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < 9a4be91e5bb032b34cb3c962f6d4f82e7ef09364`\n- `Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < fb12c87ae855346321af72e57a93c146205f1090`\n- `Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < f50a2b9e57a751e70ae9a272875d80d39eaccd6a`\n- `Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < 6bd21ec8549a5854dd64204a66289952917a924c`\n- `Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < 5c342437ea44bb829680ca9e4f683dd5b325b219`\n- `Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < c73c3fc1c7ca5a927639f0884624cb244ba791e4`\n- `Linux >= 9982464379e81ece51ced03ebecbbcd34ea367a6 < 2a665946e0407a05a3f81bd56a08553c446498e0`\n- `Linux 4.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}