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CVE-2026-45994: 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: ibmasm: fix OOB reads in command_file_write due to missing size checks The command_file_write() handler allocates a kernel buffer of exactly count bytes and copies user data into it, but does not validate the buffer against the dot command protocol before passing it to get_dot_command_size() and get_dot_command_timeout(). Since both the allocation size (count) and the header fields (command_size, data_size) are independently user-controlled, an attacker can cause get_dot_command_size() to return a value exceeding the allocation, triggering OOB reads in get_dot_command_timeout() and an out-of-bounds memcpy_toio() that leaks kernel heap memory to the service processor. Fix with two guards: reject writes smaller than sizeof(struct dot_command_header) before allocation, then after copying user data reject commands where the buffer is smaller than the total size declared by the header (sizeof(header) + command_size + data_size). This ensures all subsequent header and payload field accesses stay within the buffer.

    Засегнати продукти

    • Linux Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 44ee19422aa82a6847594866de7e5a31e4ef98b3; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 7b8a574da5d7ea99b943f7a3458a17a1d95e8838; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди d50e2019c9d7c433f56d9dff65703eb904aa1fb1; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди a672682d39dd34e2b5ba4feb436723bed65125ff; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди aefc1a97da17d8309974690c8a03e439a91ebb1c; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди ee5737891464030a189837467df3b81a273718ad; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди d0fb4d1dc43f8d5179917a2daaa82680993d4cdf; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 0eb09f737428e482a32a2e31e5e223f2b35a71d3
    • Linux Linux: 2.6.12; преди 2.6.12; 5.10.258 до 5.10.*; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.140 до 6.6.*; 6.12.86 до 6.12.*; 6.18.27 до 6.18.*; 7.0.4 до 7.0.*; от 7.1 нататък

    История

    • 27 май 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-45994: Linux | freedomonline.bg