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    <title>Most recent entries from all</title>
    <link>https://vulnerability.circl.lu</link>
    <description>Contains only the most 10 recent entries.</description>
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    <lastBuildDate>Fri, 02 Oct 2026 14:36:39 +0000</lastBuildDate>
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      <title>CVE-2024-49960 — ext4: fix timer use-after-free on failed mount</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2024-49960</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;ext4: fix timer use-after-free on failed mount&lt;/p&gt;
&lt;p&gt;Syzbot has found an ODEBUG bug in ext4_fill_super&lt;/p&gt;
&lt;p&gt;The del_timer_sync function cancels the s_err_report timer,
which reminds about filesystem errors daily. We should
guarantee the timer is no longer active before kfree(sbi).&lt;/p&gt;
&lt;p&gt;When filesystem mounting fails, the flow goes to failed_mount3,
where an error occurs when ext4_stop_mmpd is called, causing
a read I/O failure. This triggers the ext4_handle_error function
that ultimately re-arms the timer,
leaving the s_err_report timer active before kfree(sbi) is called.&lt;/p&gt;
&lt;p&gt;Fix the issue by canceling the s_err_report timer after calling ext4_stop_mmpd.&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;ext4: fix timer use-after-free on failed mount&lt;/p&gt;
&lt;p&gt;Syzbot has found an ODEBUG bug in ext4_fill_super&lt;/p&gt;
&lt;p&gt;The del_timer_sync function cancels the s_err_report timer,
which reminds about filesystem errors daily. We should
guarantee the timer is no longer active before kfree(sbi).&lt;/p&gt;
&lt;p&gt;When filesystem mounting fails, the flow goes to failed_mount3,
where an error occurs when ext4_stop_mmpd is called, causing
a read I/O failure. This triggers the ext4_handle_error function
that ultimately re-arms the timer,
leaving the s_err_report timer active before kfree(sbi) is called.&lt;/p&gt;
&lt;p&gt;Fix the issue by canceling the s_err_report timer after calling ext4_stop_mmpd.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2024-49960</guid>
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