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CVE-2026-98622: Linux

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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: act_ct: don't WARN on benign flow_offload_alloc() failure flow_offload_alloc() returns NULL when the conntrack entry is dying (e.g. raced with a conntrack flush) or when the GFP_ATOMIC allocation fails; both are expected under load and neither is a kernel bug. This path runs from softirq on every committed packet, so with panic_on_warn=1 an unprivileged user can panic the box just by racing a conntrack flush against a `tc ... action ct commit` classifier. Reproduced with a custom repro under QEMU: a small, fixed set of UDP flows through `tc filter ... action ct commit` on lo, raced against threads flooding bare ctnetlink CT_DELETE (flush) requests. Hits WARNING: net/sched/act_ct.c:437 (tcf_ct_flow_table_add(), inlined into tcf_ct_act() in this build) within ~15s on the unpatched kernel; same setup is clean on the patched kernel. The fix itself is behavior-preserving: both branches already did `goto err_alloc` before and after, only the WARN is removed.

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    • Linux Linux: 64ff70b80fd403110b67dd9f7184a604fdb0da43 преди e8fcf3f08834e939b797311742ee72b1e2a08096; 64ff70b80fd403110b67dd9f7184a604fdb0da43 преди af475f599270e59313552e6c6f3af8507da672b8; 64ff70b80fd403110b67dd9f7184a604fdb0da43 преди 424ba52c0058deeb940d02cba52eb0aeb288db33; 64ff70b80fd403110b67dd9f7184a604fdb0da43 преди d512c484bd93a5f2794aa03c9faeb7bcb82dbd4a; 64ff70b80fd403110b67dd9f7184a604fdb0da43 преди d805560ad69cb266d669341ca01e26bffb0d2c67; 64ff70b80fd403110b67dd9f7184a604fdb0da43 преди 00734f3684fcec42c319bedfe68a5d357c720b53; 64ff70b80fd403110b67dd9f7184a604fdb0da43 преди 650787233c2fd6e515a7c5f371019a9fa080ccd2; 64ff70b80fd403110b67dd9f7184a604fdb0da43 преди 47abe7a5c4eb53269aca3506446f851572a059a3
    • Linux Linux: 5.7; преди 5.7; 5.10.271 до 5.10.*; 5.15.222 до 5.15.*; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.112 до 6.12.*; 6.18.55 до 6.18.*; 7.2.9 до 7.2.*; от 7.3 нататък

    История

    • 18 октомври 2026 Публикувано

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    Първоизточници

    CVE-2026-98622: Linux | freedomonline.bg