CVE-2026-64438
intel_qat driver use-after-free in SR-IOV teardown causing kernel crash or memory corruption
Is CVE-2026-64438 being exploited?
Not confirmed. CVE-2026-64438 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 0.14% probability of exploitation in the next 30 days.
How severe is CVE-2026-64438?
CVE-2026-64438 is rated High. 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-2026-64438?
Yes. A fix has been recorded for CVE-2026-64438. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-64438 affect?
CVE-2026-64438 affects Linux kernel (intel_qat driver), Systems using Intel QuickAssist Technology (QAT) with SR-IOV, Data center appliances using QAT VF/PF. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-64438?
Install vendor kernel/driver update and reboot affected hosts immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Use-after-free in kernel driver can cause kernel memory corruption, crashes (DoS) and may enable privilege escalation or host compromise on affected systems.
Patch when possible
- affected>= ed8ccaef52fa03fb03cff45b380f72c9f869f273 and < 218c2836b3987f3fa1d9eac505462cded0821e4c
- affected>= ed8ccaef52fa03fb03cff45b380f72c9f869f273 and < 446b4d77599cf1a168573f7fb32a4a6aa4f09219
- affected>= ed8ccaef52fa03fb03cff45b380f72c9f869f273 and < 5d916c1eae1933511a69bffe243b4ee5d7da399c
- affected>= ed8ccaef52fa03fb03cff45b380f72c9f869f273 and < f344a369d0380d54c8d6c8d24734a78dd5a89817
- affected>= ed8ccaef52fa03fb03cff45b380f72c9f869f273 and < 51144032248cc4ea22917370565650670b8b4e9b
- affected>= ed8ccaef52fa03fb03cff45b380f72c9f869f273 and < 49cd5ac6de8de39a14ead609bb552d372d5602cd
- affected>= ed8ccaef52fa03fb03cff45b380f72c9f869f273 and < 6e92b28cd74fa433658efeadf21b9d4b01023d7d
- affected>= ed8ccaef52fa03fb03cff45b380f72c9f869f273 and < 277281c10c63791067d24d421f7c43a15faa9096
- affected4.3
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.