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    <lastBuildDate>Sat, 03 Oct 2026 07:27:59 +0000</lastBuildDate>
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      <title>CVE-2026-53092 — bpf: Fix linked reg delta tracking when src_reg == dst_reg</title>
      <link>https://db.gcve.eu/vuln/cve-2026-53092</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;bpf: Fix linked reg delta tracking when src_reg == dst_reg&lt;/p&gt;
&lt;p&gt;Consider the case of rX += rX where src_reg and dst_reg are pointers to
the same bpf_reg_state in adjust_reg_min_max_vals(). The latter first
modifies the dst_reg in-place, and later in the delta tracking, the
subsequent is_reg_const(src_reg)/reg_const_value(src_reg) reads the
post-{add,sub} value instead of the original source.&lt;/p&gt;
&lt;p&gt;This is problematic since it sets an incorrect delta, which sync_linked_regs()
then propagates to linked registers, thus creating a verifier-vs-runtime
mismatch. Fix it by just skipping this corner case.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;bpf: Fix linked reg delta tracking when src_reg == dst_reg&lt;/p&gt;
&lt;p&gt;Consider the case of rX += rX where src_reg and dst_reg are pointers to
the same bpf_reg_state in adjust_reg_min_max_vals(). The latter first
modifies the dst_reg in-place, and later in the delta tracking, the
subsequent is_reg_const(src_reg)/reg_const_value(src_reg) reads the
post-{add,sub} value instead of the original source.&lt;/p&gt;
&lt;p&gt;This is problematic since it sets an incorrect delta, which sync_linked_regs()
then propagates to linked registers, thus creating a verifier-vs-runtime
mismatch. Fix it by just skipping this corner case.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://db.gcve.eu/vuln/cve-2026-53092</guid>
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