CVE-2026-64223
Linux mac80211 OOB read via crafted TTLM Wi‑Fi frames
Is CVE-2026-64223 being exploited?
Not confirmed. CVE-2026-64223 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 0.25% probability of exploitation in the next 30 days.
How severe is CVE-2026-64223?
CVE-2026-64223 is rated High with a CVSS score of 8.1. 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-2026-64223?
Yes. A fix has been recorded for CVE-2026-64223. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-64223 affect?
CVE-2026-64223 affects Linux kernel (mac80211), Wi-capable Linux devices (laptops, routers, embedded), Drivers using mac80211. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-64223?
Install vendor kernel updates immediately or disable Wi‑Fi until patched
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote out‑of‑bounds read from kernel via crafted Wi‑Fi TTLM element; may leak kernel memory or crash the kernel (DoS).
Immediate action required
- affected>= 8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 and < f7d395dc5008168ac5b9c1ac2791e59a6078cca1
- affected>= 8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 and < 2dd9304727c7041df0a599595910bdbe02ad03c5
- affected>= 8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 and < 2becaaeebe230ade1fcd5d0f1cde4d6ee93ec78f
- affected>= 8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 and < a6e6ccd5bd07155c2add6c74ce1a5e68ad3b95ea
- affected6.9
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.