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      <title>CVE-2026-97029 — Flatpak: flatpak: sandboxed app can signal unsandboxed processes in the same process group</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-97029</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9&lt;/p&gt;
&lt;p&gt;Flatpak&amp;#39;s process ID namespace separation does not prevent a sandboxed app&amp;#39;s kill(0, signal) or killpg(0, signal) calls from reaching processes outside the sandbox that share the same process group. A malicious or compromised Flatpak app can use this to cause denial of service by terminating processes outside its sandbox, such as the desktop shell.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9&lt;/p&gt;
&lt;p&gt;Flatpak&amp;#39;s process ID namespace separation does not prevent a sandboxed app&amp;#39;s kill(0, signal) or killpg(0, signal) calls from reaching processes outside the sandbox that share the same process group. A malicious or compromised Flatpak app can use this to cause denial of service by terminating processes outside its sandbox, such as the desktop shell.&lt;/p&gt;</content:encoded>
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