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CVE-2026-31590: 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: KVM: SEV: Drop WARN on large size for KVM_MEMORY_ENCRYPT_REG_REGION Drop the WARN in sev_pin_memory() on npages overflowing an int, as the WARN is comically trivially to trigger from userspace, e.g. by doing: struct kvm_enc_region range = { .addr = 0, .size = -1ul, }; __vm_ioctl(vm, KVM_MEMORY_ENCRYPT_REG_REGION, &range); Note, the checks in sev_mem_enc_register_region() that presumably exist to verify the incoming address+size are completely worthless, as both "addr" and "size" are u64s and SEV is 64-bit only, i.e. they _can't_ be greater than ULONG_MAX. That wart will be cleaned up in the near future. if (range->addr > ULONG_MAX || range->size > ULONG_MAX) return -EINVAL; Opportunistically add a comment to explain why the code calculates the number of pages the "hard" way, e.g. instead of just shifting @ulen.

    Засегнати продукти

    • Linux Linux: 78824fabc72e5e37d51e6e567fde70a4fc41a6d7 преди 6a8e3c82122737529b25ef2a048fbcc569d8c055; 78824fabc72e5e37d51e6e567fde70a4fc41a6d7 преди a703933bcfa5cc76ca10e2048464600e74136099; 78824fabc72e5e37d51e6e567fde70a4fc41a6d7 преди abcd43ff579abd0a654bb4636086e78819dd5f4c; 78824fabc72e5e37d51e6e567fde70a4fc41a6d7 преди b670833749ffd8681361db2bb047c6f2e3075f3a; 78824fabc72e5e37d51e6e567fde70a4fc41a6d7 преди ab423e5892826202a660b5ac85d1125b0e8301a5; 78824fabc72e5e37d51e6e567fde70a4fc41a6d7 преди 28cc13ca20431b127d42d84ba10898d03e2c8267; 78824fabc72e5e37d51e6e567fde70a4fc41a6d7 преди c29ff288a2d97a6f4640a498a367cf0eb91312eb; 78824fabc72e5e37d51e6e567fde70a4fc41a6d7 преди 1cba4dcd795daf6d257122779fb6a349edf03914; 78824fabc72e5e37d51e6e567fde70a4fc41a6d7 преди 8acffeef5ef720c35e513e322ab08e32683f32f2
    • Linux Linux: 5.9; преди 5.9; 5.10.258 до 5.10.*; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.136 до 6.6.*; 6.12.83 до 6.12.*; 6.18.24 до 6.18.*; 6.19.14 до 6.19.*; 7.0.1 до 7.0.*; от 7.1 нататък

    История

    • 24 април 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-31590: Linux | freedomonline.bg