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CVE-2026-99083: Linux

8.8

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, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix heap out-of-bounds write in krb5_authenticate() In krb5_authenticate(), out_len is calculated to determine available headroom in response_buf for the incoming Kerberos AP-REP token. However, when SMB2_SESSION_SETUP is processed as a non-first element of a compounded SMB2 request, the calculation omits work->next_smb2_rsp_hdr_off. This causes out_len to overstate remaining buffer headroom by the cumulative size of prior responses in the compound chain. Consequently, the length check in ksmbd_krb5_authenticate() (*out_len <= resp->spnego_blob_len) passes erroneously, allowing memcpy() to write the AP-REP blob past the end of response_buf into adjacent kernel heap memory. Fix this by subtracting work->next_smb2_rsp_hdr_off when computing out_len, ensuring it accurately reflects physical remaining buffer space.

    Засегнати продукти

    • Linux Linux: 676392184785ace61e939831e7ca44a03d438c3b преди a07dfb33112a42437f9d2d0bfd35c68575257381; ef572ffa8eb44111eed2925fbb2adca78bdcbf61 преди 1f73a6d40f4d1bae4f3491c0ec1ea8ee6ce035ff; 98422bdd4cb3ca4d08844046f6507d7ec2c2b8d8 преди 59c6dcc5dd9dafe764ca0d40525933b2be69b059; 98422bdd4cb3ca4d08844046f6507d7ec2c2b8d8 преди 80af1bde97d5a85ad6f2c40ca894ccc8fa75a27a; 98422bdd4cb3ca4d08844046f6507d7ec2c2b8d8 преди 517404e157395d0f8da125ca956c566895dfcd06; 98422bdd4cb3ca4d08844046f6507d7ec2c2b8d8 преди 4722d06b2907585074252061b1024a696c1cfc23; 98422bdd4cb3ca4d08844046f6507d7ec2c2b8d8 преди 23a0be6a84a38ac169eeab49017934e8e27c65f0; 2ba03cecb12ac7ac9e0170e251543c56832d9959; 5.15.145 преди 5.15.224; 6.1.40 преди 6.1.191; 6.4.5 преди 6.5
    • Linux Linux: 6.5; преди 6.5; 5.15.224 до 5.15.*; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.58 до 6.18.*; 7.2.12 до 7.2.*; от 7.3 нататък

    История

    • 23 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-99083: Linux | freedomonline.bg