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CVE-2026-99264: 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: io_uring/net: don't retry recv on uncommitted buffers Commit 41b70df5b38b ("io_uring/net: commit partial buffers on retry") commits ring provided buffers when a receive is going to be retried after a partial transfer, so that another request using the same buffer group can't be handed the memory the first one keeps receiving into. It commits the number of bytes received so far. That does the job for a single buffer which is consumed as a whole, but the request hangs on to all it has mapped: - For a buffer ring with IOU_PBUF_RING_INC only these bytes are consumed. The rest of the buffer stays at the head of the ring. - For a bundle only the buffers which hold these bytes are consumed, the others that were peeked stay in the ring. In both cases the next receive with that buffer group gets memory that the retried request is still going to write to, and whoever comes last overwrites the data of the other. What the retry fills isn't committed at all, as the buffer list isn't known any more at that point. So the kernel hands it out again later on, while the CQE tells the application that it was used, and for an incremental buffer that it is done with. The remainder can't be committed in advance: if the request ends up receiving less, there is no way to tell the application that more was consumed than the CQE accounts for. Complete the request with what it has got instead of retrying it. MSG_WAITALL is no longer honoured for receives into incremental buffers or multi buffer bundles, they can return a short count, with the request marked as failed like for other short MSG_WAITALL transfers.

    Засегнати продукти

    • Linux Linux: fe9da1812f8697a38f7e30991d568ec199e16059 преди 21cb1770a56a51266ab96d4ed2a3b6979db59694; 41b70df5b38bc80967d2e0ed55cc3c3896bba781 преди fc8506eea4498ecba26ef8bf6dbbd74af3dc891d; 41b70df5b38bc80967d2e0ed55cc3c3896bba781 преди 97b8dc36ba3cb176b74a7929140aeaeb40d5cdc0; 41b70df5b38bc80967d2e0ed55cc3c3896bba781 преди 8444de681a179e41a4eb92d5bbe770a0677074a6; 3b53dc1c641f2884d4750fc25aaf6c36b90db606; 21a4ddb0f5e933f372808c10b9ac704505751bb1; 2eb7937b5fc7fcd90eab7bebb0181214b61b9283; 6.12.44 преди 6.12.115; 6.6.103 преди 6.7; 6.15.11 преди 6.16; 6.16.2 преди 6.17
    • Linux Linux: 6.17; преди 6.17; 6.12.115 до 6.12.*; 6.18.60 до 6.18.*; 7.2.14 до 7.2.*; от 7.4-rc1 нататък

    История

    • 3 ноември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-99264: Linux | freedomonline.bg