Linux Kernel up to 5.15.104/6.1.21/6.2.8 ksmbd smb2_open reference count

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.15.104/6.1.21/6.2.8. It has been rated as critical. The impacted element is the function smb2_open of the component ksmbd. This manipulation causes reference count. This vulnerability is tracked as CVE-2023-53061. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 5.15.104/6.1.21/6.2.8 and classified as critical. Affected by this vulnerability is the function smb2_open of the component ksmbd. The manipulation with an unknown input leads to a reference count vulnerability. The CWE definition for the vulnerability is CWE-911. The product uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix possible refcount leak in smb2_open() Reference count of acls will leak when memory allocation fails. Fix this by adding the missing posix_acl_release().

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2023-53061 since 05/02/2025. Technical details are known, but no exploit is available.

Upgrading to version 5.15.105, 6.1.22 or 6.2.9 eliminates this vulnerability. Applying the patch c33344b7972225b232966f95d31f6312dcc6273d/303f8e58cc3ace744801dcdcabfc06ffc72ed62d/a22c49a05e5e7aa2c414fbc42c49c4c01a5c9a78/2624b445544ffc1472ccabfb6ec867c199d4c95c is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.15.104
• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4
• 6.1.5
• 6.1.6
• 6.1.7
• 6.1.8
• 6.1.9
• 6.1.10
• 6.1.11
• 6.1.12
• 6.1.13
• 6.1.14
• 6.1.15
• 6.1.16
• 6.1.17
• 6.1.18
• 6.1.19
• 6.1.20
• 6.1.21
• 6.2.0
• 6.2.1
• 6.2.2
• 6.2.3
• 6.2.4
• 6.2.5
• 6.2.6
• 6.2.7
• 6.2.8

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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