CVE-2026-43110
Description
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]
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-43110
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-43110.html
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/b427c2b05222db36d32ee141609de6128e9091bb
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/9fca68c2512a362cad258e4df12a307bb2ee4b8e
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/3ec7437e9d11374105c2c4e47ae671537729d7e6
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/304950a467d83678bd0b0f46331882e2ac23b12d
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/1ae1e1caa428844e481231f6dbe9b4f475f1d52d
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | fixed | 6.19.14-1 |
| debian | sid | fixed | 6.19.14-1 |
| debian | trixie | fixed | 6.12.85-1 |
| linux-kernel | affected | 6.6.136 | |
| linux-kernel | 7.0 | affected | |
References
- https://git.kernel.org/stable/c/1ae1e1caa428844e481231f6dbe9b4f475f1d52d
- https://git.kernel.org/stable/c/304950a467d83678bd0b0f46331882e2ac23b12d
- https://git.kernel.org/stable/c/3ec7437e9d11374105c2c4e47ae671537729d7e6
- https://git.kernel.org/stable/c/9fca68c2512a362cad258e4df12a307bb2ee4b8e
- https://git.kernel.org/stable/c/b427c2b05222db36d32ee141609de6128e9091bb
- https://www.suse.com/security/cve/CVE-2026-43110.html
- https://security-tracker.debian.org/tracker/CVE-2026-43110
Verify integrity in audit chain (admin only). AS-IS.