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CVE-2026-89803: Linux

7.8

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: drm/nouveau: unsubscribe the channel-kill event before the fence context nouveau_channel_del() tears the fence context down first and only drops the channel-kill subscription later, in the middle of the nvif object teardown: if (chan->fence) nouveau_fence(chan->cli->drm)->context_del(chan); ... nvif_object_dtor(&chan->vram); nvif_event_dtor(&chan->kill); The subscribed handler is nouveau_channel_killed(), which calls nouveau_channel_kill() and from there nouveau_fence_context_kill() on chan->fence. A kill event delivered in that window takes fctx->lock and walks fctx->pending on a fence context that context_del() has already freed. Nothing reaches this below Fermi today, because the subscription is gated on FERMI_CHANNEL_GPFIFO and nothing kills a channel there. On Fermi and newer the window is real but narrow, since a kill has to land exactly while the channel is being destroyed. That is reason enough on its own, which is why this carries a Fixes: tag. The last patch in this series subscribes Tesla channels as well; nothing kills those today, so it does not widen the exposure now, but it is the groundwork for a recovery path that would, and the ordering is better fixed before that lands than alongside it. Drop the subscription before anything it depends on is torn down.

    Засегнати продукти

    • Linux Linux: ea13e5abf807ea912ce84eef6a1946b9a38c6508 преди ee1cfb1acdff3fe3b47de7c536e5c77443c8e74f; ea13e5abf807ea912ce84eef6a1946b9a38c6508 преди 5db663fbff7b88aeeeecaf5220e177e524165101; ea13e5abf807ea912ce84eef6a1946b9a38c6508 преди f5a79a9ebfbafb87ca7a896e8d6b5f33a98d097e; ea13e5abf807ea912ce84eef6a1946b9a38c6508 преди f3830fdd6930e233d727f29eee1617f7e6a0e9e5; ea13e5abf807ea912ce84eef6a1946b9a38c6508 преди 1fef7553dc628295c1208a4f2ac2094c62886e5d; ea13e5abf807ea912ce84eef6a1946b9a38c6508 преди 511585987d27d8cb668acebd399fc4deda23404c
    • Linux Linux: 5.6; преди 5.6; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.110 до 6.12.*; 6.18.51 до 6.18.*; 7.2.5 до 7.2.*; от 7.3 нататък

    История

    • 16 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-89803: Linux | freedomonline.bg