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CVE-2026-90073: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: net/sched: hhf: clamp quantum before hhf_change() to avoid overflow hhf_init() sets q->quantum = psched_mtu(qdisc_dev(sch)) with no overflow check. A device with a huge MTU (e.g. dummy with max_mtu == 0 accepting MTU 2147483634) makes weight * quantum overflow the signed deficit in hhf_dequeue(), spinning forever. Clamp q->quantum before hhf_change() so both the opt and !opt paths see a sane quantum. Without this, bare "tc qdisc add ... hhf" succeeds with a clamped quantum but "tc qdisc add ... hhf limit 1000" (any option present) fails with -EINVAL because hhf_change() re-validates the unclamped default (sch_hhf.c:559). 256 matches fq_codel's floor and is a sane minimum for a DRR quantum. Conditions to recreate the bug: a device whose MTU (plus hard_header_len) wraps psched_mtu() into the sign bit (e.g. a dummy device with max_mtu == 0 accepting MTU 2147483634). Requires CAP_NET_ADMIN in a user namespace.

    Засегнати продукти

    • Linux Linux: 10239edf86f137ce4c39b62ea9575e8053c549a0 преди 2e0f0729f922c8de13801004e2131b57646c7c5f; 10239edf86f137ce4c39b62ea9575e8053c549a0 преди 0c66223e90ddb4fd3700965a9241f2fde7bd6bc7; 10239edf86f137ce4c39b62ea9575e8053c549a0 преди 20b65bf7ca06e48ec1d62ed8012f71205328dbe4; 10239edf86f137ce4c39b62ea9575e8053c549a0 преди dea2789a9d5ff38bdd77f2e64d550430899e2839; 10239edf86f137ce4c39b62ea9575e8053c549a0 преди fa9c2055f0a60f801ccf286af53d387dc6202c3f; 10239edf86f137ce4c39b62ea9575e8053c549a0 преди 99770b5d8e0e1c69b996f74a19d71afd2c4a9aa4; 10239edf86f137ce4c39b62ea9575e8053c549a0 преди 2446644b0f6d045b01db6acbaf55552dbec8a59a; 10239edf86f137ce4c39b62ea9575e8053c549a0 преди 2164b512b97bb053e8ce4d6e95576f11bed6a005
    • Linux Linux: 3.14; преди 3.14; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.52 до 6.18.*; 7.2.6 до 7.2.*; от 7.3 нататък

    История

    • 17 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-90073: Linux | freedomonline.bg