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CVE-2026-92525: Linux

7.1

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Validate num_sge/cur_sge before indexing wqe->dma.sge[] For a user QP, qp->sq.queue is a ring the application writes directly, so rxe_post_send() takes the is_user branch and only schedules send_task without validating the WQE. rxe_requester() consumes it in place via req_next_wqe() and calls copy_data(), which indexes &wqe->dma.sge[cur_sge] with the attacker-controlled num_sge/cur_sge. Only the kernel path bounds num_sge (validate_send_wr()); the user WQE is never checked, so a local unprivileged user can post a WQE with an out-of-range cur_sge or oversized num_sge and force an out-of-bounds read of the per-WQE sge array in copy_data() (vmalloc OOB read, local DoS). Bound num_sge to qp->sq.max_sge in rxe_requester() before use, the way get_srq_wqe() already guards SRQ entries, and bound cur_sge only when the WQE carries payload (dma.resid): copy_data() returns early on a zero-length copy before touching dma->sge[], so a zero-payload WQE -- the only kind a max_sge == 0 QP can post -- stays valid. Reproduced under KASAN; the vmalloc-out-of-bounds in copy_data() is gone.

    Засегнати продукти

    • Linux Linux: 8700e3e7c4857d28ebaa824509934556da0b3e76 преди 69d3ccf6543f24c452a020c8028ca6f46cb1e8db; 8700e3e7c4857d28ebaa824509934556da0b3e76 преди 750bba6ce9bb0b11d6a166031c9728ae3f21765e; 8700e3e7c4857d28ebaa824509934556da0b3e76 преди c067aa7b231e91a18a1b3666201ab14dfb00347a; 8700e3e7c4857d28ebaa824509934556da0b3e76 преди 13cb7160e5b791f5e3ecf9311cf32849fe7e9b62; 8700e3e7c4857d28ebaa824509934556da0b3e76 преди 5ec111ddc1f727c1e4580aea459842ae5a8359a5; 8700e3e7c4857d28ebaa824509934556da0b3e76 преди 126c757e4cd46f866ddc283143b58eb4d9bf52cd
    • Linux Linux: 4.8; преди 4.8; 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-2026-92525: Linux | freedomonline.bg