What is CVE-2026-93786?

CVE-2026-93786 is a high-severity vulnerability in Linux. CVSS score: 8.1/10. Published 2026-09-24.

How severe is CVE-2026-93786?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Linux

CVE-2026-93786

In the Linux kernel, the following vulnerability has been resolved: ksmbd: preserve VFS inherited POSIX ACL mask The VFS initializes a child's POSIX ACL from the parent's default ACL and the requested creation mode. Do not mutate the parent ACL or overwrite the child's VFS-computed access and default ACLs afterwards. This preserves restrictive ACL_MASK entries and prevents SMB object creation from widening effective permissions.

Published 2026-09-24 · last modified 2026-09-25.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Linux

References

Frequently asked questions

What is CVE-2026-93786?: CVE-2026-93786 is a high-severity vulnerability in Linux. CVSS score: 8.1/10. Published 2026-09-24.
How severe is CVE-2026-93786?: High severity. CVSS v3 base score is 8.1 out of 10.