Description
In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix bug on trap in smb2_lock

If lock count is greater than 1, flags could be old value.
It should be checked with flags of smb_lock, not flags.
It will cause bug-on trap from locks_free_lock in error handling
routine.
Published: 2025-04-01
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4193-1 linux-6.1 security update
Debian DSA Debian DSA DSA-5900-1 linux security update
EUVD EUVD EUVD-2025-9377 In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix bug on trap in smb2_lock If lock count is greater than 1, flags could be old value. It should be checked with flags of smb_lock, not flags. It will cause bug-on trap from locks_free_lock in error handling routine.
Ubuntu USN Ubuntu USN USN-7605-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7605-2 Linux kernel (Low Latency) vulnerabilities
Ubuntu USN Ubuntu USN USN-7606-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-7628-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7764-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7764-2 Linux kernel (HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-7765-1 Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN Ubuntu USN USN-7766-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7767-1 Linux kernel (Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-7767-2 Linux kernel (Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-7779-1 Linux kernel (IBM) vulnerabilities
Ubuntu USN Ubuntu USN USN-7790-1 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-7800-1 Linux kernel (Raspberry Pi Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-7801-1 Linux kernel (HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-7802-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7801-2 Linux kernel (Oracle) vulnerabilities
Ubuntu USN Ubuntu USN USN-7809-1 Linux kernel (Azure, N-Series) vulnerabilities
Ubuntu USN Ubuntu USN USN-7801-3 Linux kernel (Oracle) vulnerabilities
History

Mon, 03 Nov 2025 20:30:00 +0000

Type Values Removed Values Added
References

Thu, 30 Oct 2025 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Weaknesses CWE-667
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel

Wed, 02 Apr 2025 14:00:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Low


Tue, 01 Apr 2025 16:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix bug on trap in smb2_lock If lock count is greater than 1, flags could be old value. It should be checked with flags of smb_lock, not flags. It will cause bug-on trap from locks_free_lock in error handling routine.
Title ksmbd: fix bug on trap in smb2_lock
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-05-11T21:09:33.682Z

Reserved: 2024-12-29T08:45:45.790Z

Link: CVE-2025-21944

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2025-04-01T16:15:25.513

Modified: 2025-11-03T20:17:31.290

Link: CVE-2025-21944

cve-icon Redhat

Severity : Low

Publid Date: 2025-04-01T00:00:00Z

Links: CVE-2025-21944 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses