Bug 2383449 (CVE-2025-38431)

Summary: CVE-2025-38431 kernel: smb: client: fix regression with native SMB symlinks
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-07-25 15:01:21 UTC 
In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix regression with native SMB symlinks

Some users and customers reported that their backup/copy tools started
to fail when the directory being copied contained symlink targets that
the client couldn't parse - even when those symlinks weren't followed.

Fix this by allowing lstat(2) and readlink(2) to succeed even when the
client can't resolve the symlink target, restoring old behavior.
Comment 1 Jon Moroney 2025-07-25 18:08:42 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025072537-CVE-2025-38431-9bb6@gregkh/T