What is CVE-2023-54076?

CVE-2023-54076 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2025-12-24.

How severe is CVE-2023-54076?

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

Vulnerability in Linux

CVE-2023-54076

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix missed ses refcounting Use new cifs_smb_ses_inc_refcount() helper to get an active reference of @ses and @ses->dfs_root_ses (if set). This will prevent @ses->dfs_root_ses of being put in the next call to cifs_put_smb_ses() and thus potentially causing an use-after-free bug.

EPSS: 0.002 (5.8th 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 6.3.2, 6.4, 6.2.15

References

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

Frequently asked questions

What is CVE-2023-54076?: CVE-2023-54076 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2025-12-24.
How severe is CVE-2023-54076?: Critical severity. CVSS v3 base score is 9.8 out of 10.