CVE-2026-64037
iwlwifi MLD TSO bug causes TX ring flood and kernel memory corruption.
Is CVE-2026-64037 being exploited?
Not confirmed. CVE-2026-64037 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 0.43% probability of exploitation in the next 30 days.
How severe is CVE-2026-64037?
CVE-2026-64037 is rated Critical with a CVSS score of 9.8. 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-2026-64037?
Yes. A fix has been recorded for CVE-2026-64037. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-64037 affect?
CVE-2026-64037 affects Linux kernel (iwlwifi MLD driver), Intel wireless devices using iwlwifi. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-64037?
Install vendor kernel/iwlwifi updates and reboot affected hosts.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
TSO segmentation can produce gso_size=0, flooding TX ring and causing memory corruption, use-after-free, NULL deref — leads to kernel panic, DoS, or local priv esc.
Patch when possible
- affected>= d1e879ec600f9b3bdd253167533959facfefb17b and < 9e360e610a73f62432e986775023d5382773f045
- affected>= d1e879ec600f9b3bdd253167533959facfefb17b and < cbe1c8245e4469d1aa6e12e5d913611376d23788
- affected>= d1e879ec600f9b3bdd253167533959facfefb17b and < 92cee08dc4f00e77fd1317e4343c5d458b0abab7
- affected6.15
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.