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CVE-2026-99155: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: scsi: xen/scsifront: Check for a NULL shadow entry on a backend response scsifront_do_response() validates the rqid in a backend response against VSCSIIF_MAX_REQS before using it to index info->shadow[], but then dereferences the entry to test ->inflight without checking that the slot is populated. Shadow slots are NULL before a command is submitted (the host private area is zeroed at allocation) and are reset to NULL in _scsifront_put_rqid() once a request completes, so an in-range rqid that does not correspond to an outstanding request makes the frontend dereference a NULL pointer. A malicious or buggy backend can thus crash the guest by returning a response whose rqid is in range but not in flight -- for example a spurious response before any command has been issued, or a duplicate of one already completed. The ring has only VSCSIIF_MAX_REQS (16) slots, so before the first command every in-range rqid selects a NULL slot. Reject a response whose shadow slot is not populated.

    Засегнати продукти

    • Linux Linux: 6d1c2f48f3fcf5f42967938c8ba6b42ac6b44b43 преди 448b9a8b530b753d346dab10add09a502fc719a4; 6d1c2f48f3fcf5f42967938c8ba6b42ac6b44b43 преди e397d4da76bed72db6ac4a0848fb6217f8394dca; 6d1c2f48f3fcf5f42967938c8ba6b42ac6b44b43 преди 90186a2354821329a27d92b266c0f05e8f4f637c; 6d1c2f48f3fcf5f42967938c8ba6b42ac6b44b43 преди 1d91ec793d6c80eca963d426e0da832d40a062df; 6d1c2f48f3fcf5f42967938c8ba6b42ac6b44b43 преди 15791e57f57f7050014d08cfe239d4aa1e6b94b0; 6d1c2f48f3fcf5f42967938c8ba6b42ac6b44b43 преди 8c8222c255772713eb36cde695777a1fce224917
    • Linux Linux: 5.19; преди 5.19; 6.1.191 до 6.1.*; 6.6.161 до 6.6.*; 6.12.115 до 6.12.*; 6.18.59 до 6.18.*; 7.2.13 до 7.2.*; от 7.3 нататък

    История

    • 28 октомври 2026 Публикувано

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    Първоизточници

    CVE-2026-99155: Linux | freedomonline.bg