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CVE-2026-31420: 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: bridge: mrp: reject zero test interval to avoid OOM panic br_mrp_start_test() and br_mrp_start_in_test() accept the user-supplied interval value from netlink without validation. When interval is 0, usecs_to_jiffies(0) yields 0, causing the delayed work (br_mrp_test_work_expired / br_mrp_in_test_work_expired) to reschedule itself with zero delay. This creates a tight loop on system_percpu_wq that allocates and transmits MRP test frames at maximum rate, exhausting all system memory and causing a kernel panic via OOM deadlock. The same zero-interval issue applies to br_mrp_start_in_test_parse() for interconnect test frames. Use NLA_POLICY_MIN(NLA_U32, 1) in the nla_policy tables for both IFLA_BRIDGE_MRP_START_TEST_INTERVAL and IFLA_BRIDGE_MRP_START_IN_TEST_INTERVAL, so zero is rejected at the netlink attribute parsing layer before the value ever reaches the workqueue scheduling code. This is consistent with how other bridge subsystems (br_fdb, br_mst) enforce range constraints on netlink attributes.

    Засегнати продукти

    • Linux Linux: 20f6a05ef63594feb0c6dfbd629da0448b43124d преди 610073ffb77ffd2b5eca182d2ac264de4834a175; 20f6a05ef63594feb0c6dfbd629da0448b43124d преди ec8850be9b2b3beac1c7967d95f169dd2785979d; 20f6a05ef63594feb0c6dfbd629da0448b43124d преди 1ec86b4b9e28170a2565cf36f0e6e2b96b55134d; 20f6a05ef63594feb0c6dfbd629da0448b43124d преди 2120bd8546cd6a63c558d135773aa8f41c8259fc; 20f6a05ef63594feb0c6dfbd629da0448b43124d преди 630a15a31c2034b5b697f4aabc769b9d80d82446; 20f6a05ef63594feb0c6dfbd629da0448b43124d преди e8ec80430bfa520e7352155d6ac632e527cba7aa; 20f6a05ef63594feb0c6dfbd629da0448b43124d преди c9bc352f716d1bebfe43354bce539ec2d0223b30; 20f6a05ef63594feb0c6dfbd629da0448b43124d преди fa6e24963342de4370e3a3c9af41e38277b74cf3
    • Linux Linux: 5.8; преди 5.8; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.92 до 6.12.*; 6.18.34 до 6.18.*; 6.19.12 до 6.19.*; 7.0 до *

    История

    • 13 април 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-31420: Linux | freedomonline.bg