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CVE-2026-89525: 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: udf: reject VAT indexes equal to the entry count UDF 1.50 virtual partition mapping uses the VAT as an array of physical block mappings. s_num_entries stores the number of entries in that array, not the highest valid index. The valid VAT indexes are therefore below s_num_entries. udf_get_pblock_virt15() currently rejects only indexes greater than s_num_entries. A crafted image can request index s_num_entries, pass the bounds check, and make the kernel read one entry past the allocated VAT table. Change the check to reject block >= s_num_entries, so the count is handled as an exclusive upper bound. A crafted UDF image reproduced this on origin/master commit 0e35b9b6ec0ffcc5e23cbdec09f5c622ad532b53 with a KASAN slab-out-of-bounds report in udf_get_pblock_virt15(). Trail of Bits has a reproducer that triggers kernel panic demonstrating the bug, and can share it if needed.

    Засегнати продукти

    • Linux Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди f64e01a90326bb85a3cc8aa0199931dc2f15b589; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 8a8c1c42a34349a0626d910abbad5a29136446b7; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 19f36c6453cd88fe6d60ef36ab1f1cad8ddf4ce4; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди b77b83f5529a26d084d64ece98abd6f0cc86e053; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 9193368408d792cec2057628d87862140fb1ce1c; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди b95c33a4e743874f1b0a45bf2aaa4da553552bd1; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 1bd7947f1463c21edafa256d0fbec5b99215e2b6; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди cac0cb07f29ccfb373fd4a36c81e908ef3ce608c
    • Linux Linux: 2.6.12; преди 2.6.12; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 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-2026-89525: Linux | freedomonline.bg