Unknown

CVE-2026-68403 — wifi: brcmfmac: initialize SDIO data work before cleanup

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.

Published Aug 10, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.18%

ahead of 7% of scored CVEs · Oct 30, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 9982464379e81ece51ced03ebecbbcd34ea367a6 and < 860887d22890417d43ef8298f0cc4865e29b54de≥ 9982464379e81ece51ced03ebecbbcd34ea367a6 and < 9a4be91e5bb032b34cb3c962f6d4f82e7ef09364≥ 9982464379e81ece51ced03ebecbbcd34ea367a6 and < fb12c87ae855346321af72e57a93c146205f1090≥ 9982464379e81ece51ced03ebecbbcd34ea367a6 and < f50a2b9e57a751e70ae9a272875d80d39eaccd6a≥ 9982464379e81ece51ced03ebecbbcd34ea367a6 and < 6bd21ec8549a5854dd64204a66289952917a924c≥ 9982464379e81ece51ced03ebecbbcd34ea367a6 and < 5c342437ea44bb829680ca9e4f683dd5b325b219≥ 9982464379e81ece51ced03ebecbbcd34ea367a6 and < c73c3fc1c7ca5a927639f0884624cb244ba791e4≥ 9982464379e81ece51ced03ebecbbcd34ea367a6 and < 2a665946e0407a05a3f81bd56a08553c446498e0 and 1 more version 4.1	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 30, 2026 · 15 reading(s) · max 0.18%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Aug 10, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/c73c3fc1c7ca5a927639f0884624cb244ba791e4
NIST National Vulnerability Database
git.kernel.org/stable/c/f50a2b9e57a751e70ae9a272875d80d39eaccd6a
NIST National Vulnerability Database
git.kernel.org/stable/c/5c342437ea44bb829680ca9e4f683dd5b325b219
NIST National Vulnerability Database
git.kernel.org/stable/c/860887d22890417d43ef8298f0cc4865e29b54de
NIST National Vulnerability Database
git.kernel.org/stable/c/2a665946e0407a05a3f81bd56a08553c446498e0
NIST National Vulnerability Database
git.kernel.org/stable/c/fb12c87ae855346321af72e57a93c146205f1090
NIST National Vulnerability Database
git.kernel.org/stable/c/9a4be91e5bb032b34cb3c962f6d4f82e7ef09364
NIST National Vulnerability Database
git.kernel.org/stable/c/6bd21ec8549a5854dd64204a66289952917a924c
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-99216 Drivers: hv: Don't reset VMBus connection state on error/exit paths 2d
Unknown CVE-2026-99215 power: supply: core: prevent unregistering a power supply while a callback runs 2d
Unknown CVE-2026-99207 scsi: target: Disable interrupts while holding delayed_cmd_lock 2d
Unknown CVE-2026-99208 drm/xe/oa: Zero OA buffer at allocation 2d
Unknown CVE-2026-99209 drm/xe: skip eviction of a BO with no resource 2d
Unknown CVE-2026-99210 accel/rocket: clear rdev on device init failure 2d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-68403 is "wifi: brcmfmac: initialize SDIO data work before cleanup", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.18% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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