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      <title>CVE-2026-41257 — jq: Signed-int overflow in `stack_reallocate` (jq VM stack)</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-41257</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; jqlang jq&lt;/p&gt;
&lt;p&gt;jq is a command-line JSON processor. In 1.8.1 and earlier, the jq bytecode VM&amp;#39;s data stack tracks its allocation size in a signed int. When the stack grows beyond ≈1 GiB (via deeply nested generator forks), the doubling arithmetic overflows. The wrapped value is passed to realloc and then used for a memmove with attacker-influenced offsets.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; jqlang jq&lt;/p&gt;
&lt;p&gt;jq is a command-line JSON processor. In 1.8.1 and earlier, the jq bytecode VM&amp;#39;s data stack tracks its allocation size in a signed int. When the stack grows beyond ≈1 GiB (via deeply nested generator forks), the doubling arithmetic overflows. The wrapped value is passed to realloc and then used for a memmove with attacker-influenced offsets.&lt;/p&gt;</content:encoded>
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