What is CVE-2026-43490?

CVE-2026-43490 is a high-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2026-05-15.

How severe is CVE-2026-43490?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Linux

CVE-2026-43490

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate inherited ACE SID length smb_inherit_dacl() walks the parent directory DACL loaded from the security descriptor xattr. It verifies that each ACE contains…

Vulnerability class: Buffer Overflow

EPSS: 0.004 (33.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 7.1-rc3, 7.0.7, 5.15
Linux Linux_kernel — versions 7.1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2026-43490?: CVE-2026-43490 is a high-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2026-05-15.
How severe is CVE-2026-43490?: High severity. CVSS v3 base score is 8.8 out of 10.