What is CVE-2026-64034?

CVE-2026-64034 is a critical-severity vulnerability in Linux. CVSS score: 9.3/10. Published 2026-07-19.

How severe is CVE-2026-64034?

Critical severity. CVSS v3 base score is 9.3 out of 10.

Vulnerability in Linux

CVE-2026-64034

In the Linux kernel, the following vulnerability has been resolved: net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer In mana_hwc_rx_event_handler(), resp->response.hwc_msg_id is read from DMA-coherent memory and bounds-ch…

EPSS: 0.002 (7.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Linux — versions ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f, 5.13, 0

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67

Frequently asked questions

What is CVE-2026-64034?: CVE-2026-64034 is a critical-severity vulnerability in Linux. CVSS score: 9.3/10. Published 2026-07-19.
How severe is CVE-2026-64034?: Critical severity. CVSS v3 base score is 9.3 out of 10.