What is CVE-2026-63952?

CVE-2026-63952 is a high-severity vulnerability in Linux. CVSS score: 8.4/10. Published 2026-07-19.

How severe is CVE-2026-63952?

High severity. CVSS v3 base score is 8.4 out of 10.

Vulnerability in Linux

CVE-2026-63952

In the Linux kernel, the following vulnerability has been resolved: memfd: deny writeable mappings when implying SEAL_WRITE When SEAL_EXEC is added, SEAL_WRITE is implied to make W^X. But the implied seal is set after the check that mak…

EPSS: 0.002 (10.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.

Affected products

Linux — versions c4f75bc8bd6b3d62665e1f5400c419540edb5601, 6.3, 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

Frequently asked questions

What is CVE-2026-63952?: CVE-2026-63952 is a high-severity vulnerability in Linux. CVSS score: 8.4/10. Published 2026-07-19.
How severe is CVE-2026-63952?: High severity. CVSS v3 base score is 8.4 out of 10.