CVE-2026-68403wifi: brcmfmac: initialize SDIO data work before cleanup
- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 9982464379e81ece51ced03ebecbbcd34ea367a6 – < 860887d22890417d43ef8298f0cc4865e29b54de
- affected 9982464379e81ece51ced03ebecbbcd34ea367a6 – < 9a4be91e5bb032b34cb3c962f6d4f82e7ef09364
- affected 9982464379e81ece51ced03ebecbbcd34ea367a6 – < fb12c87ae855346321af72e57a93c146205f1090
- affected 9982464379e81ece51ced03ebecbbcd34ea367a6 – < f50a2b9e57a751e70ae9a272875d80d39eaccd6a
- affected 9982464379e81ece51ced03ebecbbcd34ea367a6 – < 6bd21ec8549a5854dd64204a66289952917a924c
- affected 9982464379e81ece51ced03ebecbbcd34ea367a6 – < 5c342437ea44bb829680ca9e4f683dd5b325b219
- affected 9982464379e81ece51ced03ebecbbcd34ea367a6 – < c73c3fc1c7ca5a927639f0884624cb244ba791e4
- affected 9982464379e81ece51ced03ebecbbcd34ea367a6 – < 2a665946e0407a05a3f81bd56a08553c446498e0
- affected 4.1
- unaffected < 4.1
- unaffected 5.10.265 – ≤ 5.10.*
- unaffected 5.15.216 – ≤ 5.15.*
- unaffected 6.1.183 – ≤ 6.1.*
- unaffected 6.6.148 – ≤ 6.6.*
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/860887d22890417d43ef8298f0cc4865e29b54de (opens in a new tab)
- https://git.kernel.org/stable/c/9a4be91e5bb032b34cb3c962f6d4f82e7ef09364 (opens in a new tab)
- https://git.kernel.org/stable/c/fb12c87ae855346321af72e57a93c146205f1090 (opens in a new tab)
- https://git.kernel.org/stable/c/f50a2b9e57a751e70ae9a272875d80d39eaccd6a (opens in a new tab)
- https://git.kernel.org/stable/c/6bd21ec8549a5854dd64204a66289952917a924c (opens in a new tab)
- https://git.kernel.org/stable/c/5c342437ea44bb829680ca9e4f683dd5b325b219 (opens in a new tab)
- https://git.kernel.org/stable/c/c73c3fc1c7ca5a927639f0884624cb244ba791e4 (opens in a new tab)
- https://git.kernel.org/stable/c/2a665946e0407a05a3f81bd56a08553c446498e0 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-55589 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-68403)Record last updated .