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CVE-2026-80626: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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Време до експлоатация

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: powerpc/perf: fix preempt count underflow in fsl_emb_pmu_del fsl_emb_pmu_del() unconditionally calls put_cpu_var(cpu_hw_events) at the 'out:' label, but only calls the matching get_cpu_var() after the 'i < 0' early-return check. When event->hw.idx is negative the function jumps to 'out:' without having taken get_cpu_var(), and the trailing put_cpu_var() then issues an unmatched preempt_enable(), underflowing preempt_count. On a CONFIG_PREEMPT=y kernel preempt_count would underflow and eventually present as a 'scheduling while atomic' BUG. Move put_cpu_var() to pair with get_cpu_var() so the percpu access is correctly bracketed and the 'out:' label only handles perf_pmu_enable.

    Засегнати продукти

    • Linux Linux: a11106544f33c104706ae42d27219a409b67478e преди c0c7722308c5f303117d8bd555290fdf26b098da; a11106544f33c104706ae42d27219a409b67478e преди 67aeb1eb93d4ffd898a3e74a7f3fe46ee71feb28; a11106544f33c104706ae42d27219a409b67478e преди 9a515e00b00132b6fc3f1dd62dc5204bbda8cb10; a11106544f33c104706ae42d27219a409b67478e преди 5397142d60aa29dcf636f5459d960bfc4f97c42a; a11106544f33c104706ae42d27219a409b67478e преди b89477077c834d94381c7bf07d81193bebefcff9; a11106544f33c104706ae42d27219a409b67478e преди 73711688479df333acc134e3730fff1acba1843e; a11106544f33c104706ae42d27219a409b67478e преди b504fd953664c3f4d176ae8cb594adb3fda9d577; a11106544f33c104706ae42d27219a409b67478e преди 81e3a86030462824a67d697739cf3f387f4ba350
    • Linux Linux: 2.6.34; преди 2.6.34; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

    История

    • 28 август 2026 Публикувано

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    CVE-2026-80626: Linux | freedomonline.bg