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    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Tue, 06 Oct 2026 08:31:01 +0000</lastBuildDate>
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      <title>CVE-2026-53023 — fs/ntfs3: terminate the cached volume label after UTF-8 conversion</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-53023</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;fs/ntfs3: terminate the cached volume label after UTF-8 conversion&lt;/p&gt;
&lt;p&gt;ntfs_fill_super() loads the on-disk volume label with utf16s_to_utf8s()
and stores the result in sbi-&amp;gt;volume.label. The converted label is later
exposed through ntfs3_label_show() using %s, but utf16s_to_utf8s() only
returns the number of bytes written and does not add a trailing NUL.&lt;/p&gt;
&lt;p&gt;If the converted label fills the entire fixed buffer,
ntfs3_label_show() can read past the end of sbi-&amp;gt;volume.label while
looking for a terminator.&lt;/p&gt;
&lt;p&gt;Terminate the cached label explicitly after a successful conversion and
clamp the exact-full case to the last byte of the buffer.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;fs/ntfs3: terminate the cached volume label after UTF-8 conversion&lt;/p&gt;
&lt;p&gt;ntfs_fill_super() loads the on-disk volume label with utf16s_to_utf8s()
and stores the result in sbi-&amp;gt;volume.label. The converted label is later
exposed through ntfs3_label_show() using %s, but utf16s_to_utf8s() only
returns the number of bytes written and does not add a trailing NUL.&lt;/p&gt;
&lt;p&gt;If the converted label fills the entire fixed buffer,
ntfs3_label_show() can read past the end of sbi-&amp;gt;volume.label while
looking for a terminator.&lt;/p&gt;
&lt;p&gt;Terminate the cached label explicitly after a successful conversion and
clamp the exact-full case to the last byte of the buffer.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2026-53023</guid>
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