What is CVE-2026-23327?

CVE-2026-23327 is a high-severity vulnerability in Linux, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2026-03-25.

How severe is CVE-2026-23327?

High severity. CVSS v3 base score is 7.1 out of 10.

Out-of-bounds Read in Linux

CVE-2026-23327

In the Linux kernel, the following vulnerability has been resolved: cxl/mbox: validate payload size before accessing contents in cxl_payload_from_user_allowed() cxl_payload_from_user_allowed() casts and dereferences the input payload wit…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (4.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Affected products

Linux — versions 6.18.34, 6.19.7, 5.19
Linux Linux_kernel — versions 5.19, 7.0

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

Frequently asked questions

What is CVE-2026-23327?: CVE-2026-23327 is a high-severity vulnerability in Linux, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2026-03-25.
How severe is CVE-2026-23327?: High severity. CVSS v3 base score is 7.1 out of 10.