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CVE-2026-89530: Linux

9.8

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 по мрежата, без особени условия, без вход и без действие от потребителя.

  • Експлоатация: няма данни за експлоатация
  • Атаката може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: svcrdma: Reject inline replies that overflow the pull-up buffer An RPC-over-RDMA client can request a reply, such as an NFS READ payload, without providing a Write list or a Reply chunk to carry it. When such a reply needs more scatter/gather entries than the device's Send Queue supports, svc_rdma_pull_up_needed() selects pull-up and svc_rdma_pull_up_reply_msg() linearizes the whole reply into sctxt->sc_xprt_buf. That buffer is only sc_max_req_size bytes, while the reply on this path is bounded only by the client's request, so svc_rdma_xb_linearize() copies past the end of the buffer and corrupts adjacent slab memory. The oversized length is then stored in sc_sges[0].length and posted, so the device also reads beyond the mapped region. The SGE-exhaustion branch is the only pull-up path that can exceed the buffer: the threshold branch pulls up only replies smaller than RPCRDMA_PULLUP_THRESH, and replies that fit the device's SGE budget are sent directly without linearization. Make svc_rdma_pull_up_needed() report -E2BIG when the reply it would pull up cannot fit sc_max_req_size, and fail the request with ERR_CHUNK as RFC 8166 Section 4.5.3 directs rather than dropping the connection. The helper no longer answers a simple yes/no question: it now reports pull-up, no pull-up, or -E2BIG for a reply too large to linearize. Rename svc_rdma_pull_up_needed() to svc_rdma_check_pull_up() so its name no longer implies a boolean predicate.

Засегнати продукти

  • Linux Linux: e248aa7be86e8179f20ac0931774ecd746f3f5bf преди b73011049dbe909f73fd9620d94ef1757d7af2eb; e248aa7be86e8179f20ac0931774ecd746f3f5bf преди 8068358f445a11296328ffa7c524701596814a17; e248aa7be86e8179f20ac0931774ecd746f3f5bf преди fcd91b9957462d398792201c239dffaeff1cc8b2; e248aa7be86e8179f20ac0931774ecd746f3f5bf преди 1949dd1576f7a8aa161b1330c6125df9d53046d5; e248aa7be86e8179f20ac0931774ecd746f3f5bf преди 8ec60eb51fae37cd3d334ff26e4a7d6fb21ff7cf; e248aa7be86e8179f20ac0931774ecd746f3f5bf преди 0fbe20dfe74b783d255bf389a6ea77aa25dc7860; 9b65b18f817d9ada2bf67351f24bdcce6789a0bb; d564356e1919d1178568c19af410cfc1a9076663; 4.19.22 преди 4.20; 4.20.9 преди 4.21
  • Linux Linux: 5.0; преди 5.0; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

История

  • 11 септември 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-89530: Linux | freedomonline.bg