CVE-2026-74409
Linux rtw89 Wi‑Fi driver bounds-check bug allows kernel memory corruption.
Is CVE-2026-74409 being exploited?
Not confirmed. CVE-2026-74409 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-2026-74409?
CVE-2026-74409 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-2026-74409?
Yes. A fix has been recorded for CVE-2026-74409. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74409 affect?
CVE-2026-74409 affects Linux kernel (rtw89 Wi‑Fi driver), Devices using Realtek rtw89 Wi‑Fi, Embedded Linux systems with rtw89. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74409?
Apply kernel/rtw89 driver updates and avoid untrusted Wi‑Fi firmware.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unvalidated firmware mac_id can cause out-of-bounds array access, enabling kernel memory corruption leading to DoS or local privilege escalation.
Patch when possible
- affected>= 144c6cd24b3556e6e7a14271cee57a42ebf97450 and < ad445de67359f24088d4305c05fbd7e34c4e35e3
- affected>= 144c6cd24b3556e6e7a14271cee57a42ebf97450 and < 920101305e7601a33b9e01019f4ca526af2526ae
- affected>= 144c6cd24b3556e6e7a14271cee57a42ebf97450 and < 6d88244bb129755acca696f9227200f4a2d106a6
- affected6.14
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.