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CVE-2026-80838: 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: vxlan: keep the last remote linked during FDB flush A non-nexthop FDB entry is expected to have at least one remote while it remains reachable through the FDB hash table. A filtered bulk flush violates this invariant when every remote matches: It unlinks the last remote in vxlan_fdb_dst_destroy() and only afterwards tells vxlan_flush() to destroy the parent FDB entry. An RCU reader can find the parent during this interval. first_remote_rcu() then applies list_entry_rcu() to the empty list head, producing an invalid remote pointer that the receive learning path can read from and write to. When a matching remote is the sole remaining remote, leave it linked and ask the caller to destroy the entire FDB entry. vxlan_fdb_destroy() keeps the remote attached while sending the deletion notification and removing the parent from the lookup structures.

    Засегнати продукти

    • Linux Linux: c499fccb71cb85902b5c5b9ce9c9ae6683e54a8f преди 2a7c2f00843225d5f037676bca649321f3d024c7; c499fccb71cb85902b5c5b9ce9c9ae6683e54a8f преди a8820c8a7718327e96849782033e7c85a0f6bcfe; c499fccb71cb85902b5c5b9ce9c9ae6683e54a8f преди 8ba68fd6cdd1e3c92b92f25c7e48bf7bd51a183c; c499fccb71cb85902b5c5b9ce9c9ae6683e54a8f преди 4bbc76ee1b21d3bd045d6d819b2bacd30a6372ab; c499fccb71cb85902b5c5b9ce9c9ae6683e54a8f преди d5d4a7b538b52db63927773a8905fcd9f78a42e2
    • Linux Linux: 6.7; преди 6.7; 6.12.108 до 6.12.*; 6.18.49 до 6.18.*; 7.1.13 до 7.1.*; 7.2.3 до 7.2.*; 7.3 до *

    История

    • 4 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-80838: Linux | freedomonline.bg