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CVE-2026-31423: 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: net/sched: sch_hfsc: fix divide-by-zero in rtsc_min() m2sm() converts a u32 slope to a u64 scaled value. For large inputs (e.g. m1=4000000000), the result can reach 2^32. rtsc_min() stores the difference of two such u64 values in a u32 variable `dsm` and uses it as a divisor. When the difference is exactly 2^32 the truncation yields zero, causing a divide-by-zero oops in the concave-curve intersection path: Oops: divide error: 0000 RIP: 0010:rtsc_min (net/sched/sch_hfsc.c:601) Call Trace: init_ed (net/sched/sch_hfsc.c:629) hfsc_enqueue (net/sched/sch_hfsc.c:1569) [...] Widen `dsm` to u64 and replace do_div() with div64_u64() so the full difference is preserved.

    Засегнати продукти

    • Linux Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди ad8e8fec40290a8c8cf145c0deaadf76f80c5163; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди ab1ff5890c7354afc7be56502fcfbd61f3b7ae4f; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 25b6821884713a31e2b49fb67b0ebd765b33e0a9; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди c56f78614e7781aaceca9bd3cb2128bf7d45c3bd; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди b9e6431cbea8bb1fae8069ed099b4ee100499835; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 17c1b9807b8a67d676b6dcf749ee932ebaa7f568; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди d0aefec1b1a1ba2c1d251028dc2c4e5b4ce1fea5; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 4576100b8cd03118267513cafacde164b498b322
    • Linux Linux: 2.6.12; преди 2.6.12; 5.10.253 до 5.10.*; 5.15.203 до 5.15.*; 6.1.168 до 6.1.*; 6.6.134 до 6.6.*; 6.12.81 до 6.12.*; 6.18.22 до 6.18.*; 6.19.12 до 6.19.*; от 7.0 нататък
    • Siemens: още 3 продукта, добавени от Siemens

      SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

    История

    • 13 април 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-31423: Linux | freedomonline.bg