Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel up to 5.15.50/5.18.7. Impacted is the function v9fs_vfs_atomic_open_dotl. Such manipulation leads to reference count. This vulnerability is uniquely identified as CVE-2022-49705. No exploit exists. Upgrading the affected component is recommended. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.15.50/5.18.7 and classified as critical. Affected by this issue is the function v9fs_vfs_atomic_open_dotl. The manipulation with an unknown input leads to a reference count vulnerability. Using CWE to declare the problem leads to CWE-911. The product uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: 9p: fix fid refcount leak in v9fs_vfs_atomic_open_dotl We need to release directory fid if we fail halfway through open This fixes fid leaking with xfstests generic 531

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2022-49705 since 02/26/2025. Technical details are known, but there is no available exploit.

Upgrading to version 5.15.51 or 5.18.8 eliminates this vulnerability. Applying the patch 22832ac3eb5be3f7168816a76b64c1284e12eb3c/8bc5412ba1a45edfd1e451874c483c26a097af2b/beca774fc51a9ba8abbc869cf0c3d965ff17cd24 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.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11
• 5.15.12
• 5.15.13
• 5.15.14
• 5.15.15
• 5.15.16
• 5.15.17
• 5.15.18
• 5.15.19
• 5.15.20
• 5.15.21
• 5.15.22
• 5.15.23
• 5.15.24
• 5.15.25
• 5.15.26
• 5.15.27
• 5.15.28
• 5.15.29
• 5.15.30
• 5.15.31
• 5.15.32
• 5.15.33
• 5.15.34
• 5.15.35
• 5.15.36
• 5.15.37
• 5.15.38
• 5.15.39
• 5.15.40
• 5.15.41
• 5.15.42
• 5.15.43
• 5.15.44
• 5.15.45
• 5.15.46
• 5.15.47
• 5.15.48
• 5.15.49
• 5.15.50
• 5.18.0
• 5.18.1
• 5.18.2
• 5.18.3
• 5.18.4
• 5.18.5
• 5.18.6
• 5.18.7

License

• open-source

Website

• Vendor: https://www.kernel.org/

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