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CVE-2026-90011: Linux

9.1

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.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Reserve a terminator byte for the login payload iscsi_target_check_login_request() rejects a login PDU whose DataSegmentLength exceeds MAX_KEY_VALUE_PAIRS, but the test is '>' and login->req_buf is allocated with exactly MAX_KEY_VALUE_PAIRS bytes. Since iscsit_get_login_rx() receives payload_length + padding bytes, where padding = ((-payload_length) & 3); any payload_length from 8189 to 8192 fills the whole 8192 byte buffer. The write stays in bounds, but no byte is left for a NUL terminator. The buffer is subsequently consumed as a C string. In the CHAP path chap_check_algorithm() calls kstrdup(a_str), and extract_param() calls strstr(in_buf, pattern) followed by strlen_semi(), none of which take a length. convert_null_to_semi() additionally rewrites every embedded NUL to ';', so even a payload made of well formed NUL separated key=value records is left without a terminator. These walk past the end of the object into adjacent slab memory. It is reachable by an unauthenticated initiator against a portal configured for CHAP; when authentication is not required iscsi_login_zero_tsih_s2() rewrites AuthMethod to None and the CHAP path is never entered. Allocate one extra byte. kzalloc() zeroes it and nothing ever writes to it, as every writer copies to offset 0 for at most MAX_KEY_VALUE_PAIRS bytes, so the buffer is always terminated.

    Засегнати продукти

    • Linux Linux: e48354ce078c079996f89d715dfa44814b4eba01 преди 5fac79f248c37774d1dd761406f83d25ca6ff8e4; e48354ce078c079996f89d715dfa44814b4eba01 преди 6ddddcad436d8e6e619204d3c848147ff2f5bf1e; e48354ce078c079996f89d715dfa44814b4eba01 преди b19dc17ed963ac36c0db4b52a1803fb11169f91f; e48354ce078c079996f89d715dfa44814b4eba01 преди 6b589ef9d5f6cdc70d2b4f269ca6cf26b5ebb076; e48354ce078c079996f89d715dfa44814b4eba01 преди eb9dadf4d552ebe10644871c5189286552aa48f5; e48354ce078c079996f89d715dfa44814b4eba01 преди 1624bff4c5118ad494d50ad94d44f22064667a7f; e48354ce078c079996f89d715dfa44814b4eba01 преди 3ddf3ea291a0ef2ea93b82e158960ac2cc42302b; e48354ce078c079996f89d715dfa44814b4eba01 преди f4825922d2fb371e2b969697d792077f1b62b62c
    • Linux Linux: 3.1; преди 3.1; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.51 до 6.18.*; 7.2.5 до 7.2.*; от 7.3 нататък

    История

    • 16 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-90011: Linux | freedomonline.bg