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

ksmbd: fix use-after-free in smb_break_all_levII_oplock()

There is a room in smb_break_all_levII_oplock that can cause racy issues
when unlocking in the middle of the loop. This patch use read lock
to protect whole loop.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00025.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
0626e6641f6b467447c81dd7678a69c66f7746cf affected < 296cb5457cc6f4a754c4ae29855f8a253d52bcc6
0626e6641f6b467447c81dd7678a69c66f7746cf affected < d54ab1520d43e95f9b2e22d7a05fc9614192e5a5
0626e6641f6b467447c81dd7678a69c66f7746cf affected < d73686367ad68534257cd88a36ca3c52cb8b81d8
0626e6641f6b467447c81dd7678a69c66f7746cf affected < 18b4fac5ef17f77fed9417d22210ceafd6525fc7
Linux Linux affected
Version Status Constraints
5.15 affected —
0 unaffected < 5.15
6.6.88 unaffected ≤ 6.6.*
6.12.25 unaffected ≤ 6.12.*
6.14.4 unaffected ≤ 6.14.*
6.15 unaffected ≤ *

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*

No data.

No data.

Project Subscriptions

Vendors Products
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Linux Kernel Subscribe
Advisories
Source ID Title
EUVD EUVD EUVD-2025-13041 In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb_break_all_levII_oplock() There is a room in smb_break_all_levII_oplock that can cause racy issues when unlocking in the middle of the loop. This patch use read lock to protect whole loop.
Ubuntu USN Ubuntu USN USN-7594-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7594-2 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7594-3 Linux kernel vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/18b4fac5ef17f77fed9417d22210ceafd6525fc7 cve-icon cve-icon
https://git.kernel.org/stable/c/296cb5457cc6f4a754c4ae29855f8a253d52bcc6 cve-icon cve-icon
https://git.kernel.org/stable/c/d54ab1520d43e95f9b2e22d7a05fc9614192e5a5 cve-icon cve-icon
https://git.kernel.org/stable/c/d73686367ad68534257cd88a36ca3c52cb8b81d8 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025050115-CVE-2025-37776-9bfb@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-37776 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-37776 cve-icon
History

Fri, 14 Nov 2025 17:00:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Weaknesses CWE-416
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
Metrics 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'}

 cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Fri, 02 May 2025 14:45:00 +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

Moderate

Thu, 01 May 2025 13:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb_break_all_levII_oplock() There is a room in smb_break_all_levII_oplock that can cause racy issues when unlocking in the middle of the loop. This patch use read lock to protect whole loop.
Title ksmbd: fix use-after-free in smb_break_all_levII_oplock()
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-05-26T05:20:38.759Z

Reserved: 2025-04-16T04:51:23.939Z

Link: CVE-2025-37776

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2025-05-01T14:15:41.373

Modified: 2025-11-14T16:45:45.340

Link: CVE-2025-37776

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-05-01T00:00:00Z

Links: CVE-2025-37776 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses