https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Mon, 05 Oct 2026 23:34:05 +0000 https://vulnerability.circl.lu/vuln/cve-2026-80626 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>powerpc/perf: fix preempt count underflow in fsl_emb_pmu_del</p> <p>fsl_emb_pmu_del() unconditionally calls put_cpu_var(cpu_hw_events) at the &#39;out:&#39; label, but only calls the matching get_cpu_var() after the &#39;i &lt; 0&#39; early-return check. When event-&gt;hw.idx is negative the function jumps to &#39;out:&#39; without having taken get_cpu_var(), and the trailing put_cpu_var() then issues an unmatched preempt_enable(), underflowing preempt_count.</p> <p>On a CONFIG_PREEMPT=y kernel preempt_count would underflow and eventually present as a &#39;scheduling while atomic&#39; BUG.</p> <p>Move put_cpu_var() to pair with get_cpu_var() so the percpu access is correctly bracketed and the &#39;out:&#39; label only handles perf_pmu_enable.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>powerpc/perf: fix preempt count underflow in fsl_emb_pmu_del</p> <p>fsl_emb_pmu_del() unconditionally calls put_cpu_var(cpu_hw_events) at the &#39;out:&#39; label, but only calls the matching get_cpu_var() after the &#39;i &lt; 0&#39; early-return check. When event-&gt;hw.idx is negative the function jumps to &#39;out:&#39; without having taken get_cpu_var(), and the trailing put_cpu_var() then issues an unmatched preempt_enable(), underflowing preempt_count.</p> <p>On a CONFIG_PREEMPT=y kernel preempt_count would underflow and eventually present as a &#39;scheduling while atomic&#39; BUG.</p> <p>Move put_cpu_var() to pair with get_cpu_var() so the percpu access is correctly bracketed and the &#39;out:&#39; label only handles perf_pmu_enable.</p> https://vulnerability.circl.lu/vuln/cve-2026-80626