What is CVE-2026-64066?

CVE-2026-64066 is a critical-severity vulnerability in Linux, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2026-07-19.

How severe is CVE-2026-64066?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Out-of-bounds Read in Linux

CVE-2026-64066

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix netfs_read_to_pagecache() to pause on subreq failure Fix netfs_read_to_pagecache() so that it pauses the generation of new subrequests if an already-issued subrequest fails.

Vulnerability class: Buffer Overflow

EPSS: 0.004 (37.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions ee4cdf7ba857a894ad1650d6ab77669cbbfa329e, 6.12, 0
Linux Linux_kernel — versions 7.1

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-64066?: CVE-2026-64066 is a critical-severity vulnerability in Linux, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2026-07-19.
How severe is CVE-2026-64066?: Critical severity. CVSS v3 base score is 9.8 out of 10.