What is CVE-2026-45972?

CVE-2026-45972 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2026-05-27.

How severe is CVE-2026-45972?

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

Vulnerability in Linux

CVE-2026-45972

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF and double free in smb2_open_file() Zero out @err_iov and @err_buftype before retrying SMB2_open() to prevent an UAF bug if @data != NULL…

EPSS: 0.001 (22.0th 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 743f70406264348c0830f38409eb6c40a42fb2db, 3a6d6b332f92990958602c1e35ce0173e2dd62e9, b64e3b5d8d759dd4333992e4ba4dadf9359952c8

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
416baaa9-dc9f-4396-8d5f-8c081fb06d67

Frequently asked questions

What is CVE-2026-45972?: CVE-2026-45972 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2026-05-27.
How severe is CVE-2026-45972?: Critical severity. CVSS v3 base score is 9.8 out of 10.