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CVE-2026-98072: 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/rds: use wq_has_sleeper() in release_in_xmit() release_in_xmit() clears RDS_IN_XMIT with clear_bit_unlock() and then checks waitqueue_active() to decide whether anyone needs waking. clear_bit_unlock() is only a release operation: it orders the critical section before the bit clear, but does not order the subsequent plain load of the wait queue head after it. The waiter side does the mirror image - it adds itself to the wait queue and then tests the bit. That is the classic store-buffering pattern: the releasing CPU can read the wait queue as empty while the waiting CPU still reads the bit as set, so the sleeper is never woken. The waiters are rds_conn_shutdown() and rds_tcp_reset_callbacks(), both in uninterruptible wait_event() with no timeout. A lost wake-up strands the shutdown worker on its single-threaded workqueue until some other sender releases the bit again - and on a connection that is being torn down precisely because it failed, there may never be another sender. The barrier used to be there: release_in_xmit() did clear_bit() followed by smp_mb__after_atomic() until commit 1422f28826d2 ("rds: introduce acquire/release ordering in acquire/release_in_xmit()") folded both into clear_bit_unlock(), which strengthened the lock hand-off but silently dropped the full barrier the wake-up check depends on. The refill counterpart, release_refill() in net/rds/ib_recv.c, still carries its smp_mb__after_atomic() for exactly this reason. Use wq_has_sleeper(), which is waitqueue_active() preceded by the required full barrier.

    Засегнати продукти

    • Linux Linux: 1e1e4316fcaeb9cd6bc56c91127e88625237dd44 преди 6f552364d97cf4005c7a58f11c9f79e14e269865; 8c378cc522aedd5fa5aa53486b43a4d552fbbd5c преди a94b1dfc82454c5bc068e71c25393af674daf63b; 52287ed416a10bc3d3e204a3186d9509ab3ee634 преди 5a806ed1eb46850ca4159a18b2a8c4b70f0c1341; 4a4dffdff9ea6201665f5d0a5042011d09bd527f преди 3d401934b7edb3ccb07d982dabadd04c45ee307c; 1422f28826d2a0c11e5240b3e951c9e214d8656e преди ed7ee0cd0e136d02f87f13181b1a89880463c7e9; 1422f28826d2a0c11e5240b3e951c9e214d8656e преди a269795107f45adc95975a83324f8fef40bec4ce; 1422f28826d2a0c11e5240b3e951c9e214d8656e преди 3764627b30a283e611e652c4a2bb8cdc74a75a99; 1422f28826d2a0c11e5240b3e951c9e214d8656e преди 6d0c8b7073913011459cf968cbbadd341e166bc3; bec6c4ce1169a565c58c347d5d0ac22e46d507d6; f781fb5177cdfd9a6c98cd94e30275457c6461ac; 917135195200e20e5244b9c3f2bb40f3d5e02510; d792459a6e2ae21c7f5107babd63e52e4c5ab93a; 5.10.214 преди 5.10.271; 5.15.153 преди 5.15.222; 6.1.83 преди 6.1.189; 6.6.23 преди 6.6.158; 4.19.311 преди 4.20; 5.4.273 преди 5.5; 6.7.11 преди 6.8; 6.8.2 преди 6.9
    • Linux Linux: 6.9; преди 6.9; 5.10.271 до 5.10.*; 5.15.222 до 5.15.*; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.111 до 6.12.*; 6.18.53 до 6.18.*; 7.2.7 до 7.2.*; от 7.3 нататък

    История

    • 25 септември 2026 Публикувано

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    Първоизточници

    CVE-2026-98072: Linux | freedomonline.bg