Critical 9.8Published Dec 24, 2025

CVE-2023-54076smb: client: fix missed ses refcounting

Updated under an hour ago (Oct 26, 2026, 10:00 PM ET)

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Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 8e3554150d6c80a84b3cb046615d1a0e943811dc before eb382196e6f6e05cfafdab797840e5a96c6e7bf0; from 8e3554150d6c80a84b3cb046615d1a0e943811dc before bf99f6be2d20146942bce6f9e90a0ceef12cbc1e; f30d226bcc9f0e2d97b4a6e94c43a28148fbeab6; c082c3be0f96e759ff2e361d929832fda0b93851; from 6.2.15 before 6.3; from 6.3.2 before 6.4	CNA record

References

References

https://git.kernel.org/stable/c/eb382196e6f6e05cfafdab797840e5a96c6e7bf0
https://git.kernel.org/stable/c/bf99f6be2d20146942bce6f9e90a0ceef12cbc1e

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.