High 8.8Published May 6, 2026

CVE-2026-43110wifi: brcmfmac: validate bsscfg indices in IF events

Updated under an hour ago (Oct 27, 2026, 3:23 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: validate bsscfg indices in IF events brcmf_fweh_handle_if_event() validates the firmware-provided interface index before it touches drvr->iflist[], but it still uses the raw bsscfgidx field as an array index without a matching range check. Reject IF events whose bsscfg index does not fit in drvr->iflist[] before indexing the interface array. [add missing wifi prefix]

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-129
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 2880b86859967af710c72f7d34fb421a86a71e22 before b329fbcf075949a038045d8e9b86ae3d5bbd8a54; 2880b86859967af710c72f7d34fb421a86a71e22 builds before 2ae3ccb78c0a9ef5ee3d80d02ab319ac1d5af734; 2880b86859967af710c72f7d34fb421a86a71e22 builds before 9c81bcc2c695e0082012a2a3d36a0eefaa51579c; 2880b86859967af710c72f7d34fb421a86a71e22 builds before 3ec7437e9d11374105c2c4e47ae671537729d7e6; 2880b86859967af710c72f7d34fb421a86a71e22 builds before 9fca68c2512a362cad258e4df12a307bb2ee4b8e; 2880b86859967af710c72f7d34fb421a86a71e22 builds before 1ae1e1caa428844e481231f6dbe9b4f475f1d52d; from 2880b86859967af710c72f7d34fb421a86a71e22 before b427c2b05222db36d32ee141609de6128e9091bb; from 2880b86859967af710c72f7d34fb421a86a71e22 before 304950a467d83678bd0b0f46331882e2ac23b12d	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
linux linux_kernel linux:linux_kernel	from 3.9 before 6.6.136; from 6.7 before 6.12.83; from 6.13 before 6.18.24; from 6.19 before 6.19.14; 7.0; 7.0; 7.0; 7.0; and 3 more ranges	NVD

References

References

https://git.kernel.org/stable/c/b329fbcf075949a038045d8e9b86ae3d5bbd8a54
https://git.kernel.org/stable/c/2ae3ccb78c0a9ef5ee3d80d02ab319ac1d5af734
https://git.kernel.org/stable/c/9c81bcc2c695e0082012a2a3d36a0eefaa51579c
https://git.kernel.org/stable/c/3ec7437e9d11374105c2c4e47ae671537729d7e6	patch
https://git.kernel.org/stable/c/9fca68c2512a362cad258e4df12a307bb2ee4b8e	patch
https://git.kernel.org/stable/c/1ae1e1caa428844e481231f6dbe9b4f475f1d52d	patch
https://git.kernel.org/stable/c/b427c2b05222db36d32ee141609de6128e9091bb	patch
https://git.kernel.org/stable/c/304950a467d83678bd0b0f46331882e2ac23b12d	patch
https://cert-portal.siemens.com/productcert/html/ssa-784472.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.