CVE-2026-43110
Linux kernel brcmfmac: fix for IF event bsscfg index out-of-bounds
Is CVE-2026-43110 being exploited?
Not confirmed. CVE-2026-43110 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.24% probability of exploitation in the next 30 days.
How severe is CVE-2026-43110?
CVE-2026-43110 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-43110?
Yes. A fix has been recorded for CVE-2026-43110. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-43110 affect?
CVE-2026-43110 affects Linux kernel brcmfmac WiFi driver. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-43110?
Apply patched kernel update; reboot to enforce.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Out-of-bounds access in brcmfmac IF events; could crash kernel or memory corruption.
Patch when possible
- affected>= 2880b86859967af710c72f7d34fb421a86a71e22 and < b329fbcf075949a038045d8e9b86ae3d5bbd8a54
- affected>= 2880b86859967af710c72f7d34fb421a86a71e22 and < 2ae3ccb78c0a9ef5ee3d80d02ab319ac1d5af734
- affected>= 2880b86859967af710c72f7d34fb421a86a71e22 and < 9c81bcc2c695e0082012a2a3d36a0eefaa51579c
- affected>= 2880b86859967af710c72f7d34fb421a86a71e22 and < 3ec7437e9d11374105c2c4e47ae671537729d7e6
- affected>= 2880b86859967af710c72f7d34fb421a86a71e22 and < 9fca68c2512a362cad258e4df12a307bb2ee4b8e
- affected>= 2880b86859967af710c72f7d34fb421a86a71e22 and < 1ae1e1caa428844e481231f6dbe9b4f475f1d52d
- affected>= 2880b86859967af710c72f7d34fb421a86a71e22 and < b427c2b05222db36d32ee141609de6128e9091bb
- affected>= 2880b86859967af710c72f7d34fb421a86a71e22 and < 304950a467d83678bd0b0f46331882e2ac23b12d
- affected3.9
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.