CVE-2026-31410

Analyzed Analyzed - Analysis Complete

Improper Volume ID Handling in Linux ksmbd Causes Data Integrity Risk

Publication date: 2026-04-06

Last updated on: 2026-05-20

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use volume UUID in FS_OBJECT_ID_INFORMATION Use sb->s_uuid for a proper volume identifier as the primary choice. For filesystems that do not provide a UUID, fall back to stfs.f_fsid obtained from vfs_statfs().

CVSS Scores

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Meta Information

Published

2026-04-06

Last Modified

2026-05-20

Generated

2026-07-06

AI Q&A

2026-04-07

EPSS Evaluated

2026-07-05

NVD

CVE-2026-31410

EUVD

EUVD-2026-19194

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	From 6.13 (inc) to 6.18.20 (exc)
linux	linux_kernel	From 6.19 (inc) to 6.19.10 (exc)
linux	linux_kernel	From 5.15 (inc) to 6.12.78 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Impact Analysis

This vulnerability relates to the Linux kernel's ksmbd component using an improper volume identifier. The fix involves using the volume UUID as the primary identifier to ensure proper volume identification.

Improper volume identification could potentially lead to issues in file system operations or security mechanisms relying on unique volume identifiers, but specific impacts are not detailed.

Executive Summary

This vulnerability in the Linux kernel's ksmbd component relates to how the volume identifier is determined. Previously, the system may not have used the proper volume UUID as the primary identifier. The fix ensures that the volume UUID (sb->s_uuid) is used as the main volume identifier. If the filesystem does not provide a UUID, it falls back to using stfs.f_fsid obtained from vfs_statfs().

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