CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix use-before-check of ReparseDataLength in reparse_buf_ptr() reparse_buf_ptr() reads buf->ReparseDataLength before checking that count covers the full fixed header: buf = (struct reparse_data_buffer *)((u8 *)io + off); len = sizeof(*buf); /* 8 bytes */ rdlen = le16_to_cpu(buf->ReparseDataLength); /* offset 4, 2 bytes */ if (count < len || count < rdlen + len) /* check comes after */ struct reparse_data_buffer has ReparseDataLength at offset 4. If a server returns OutputCount < 6, the read at offset 4-5 reaches past the end of the received data. The off+count bounds against iov_len were already validated, but that does not protect against count being smaller than sizeof(*buf). Split the check: verify count >= sizeof(*buf) before reading ReparseDataLength, then verify count covers the data region.
Засегнати продукти
- Linux Linux: a158bb66b1373866d9fd5997565a58a573085539 преди b70bc592afd19732e2e4563300ebe8f974280365; 67ec9949b0dfe78c99e110dd975eb7dc5645630c преди 711cf71300d7992f450600df8864917d3538679f; 67ec9949b0dfe78c99e110dd975eb7dc5645630c преди 05f78e6cf34ea3a285053bd5999e08e8ac298bd5; 6.6.32 преди 6.6.160
- Linux Linux: 6.8; преди 6.8; 6.6.160 до 6.6.*; 7.2.4 до 7.2.*; от 7.3 нататък
История
- 11 септември 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-89632
- https://nvd.nist.gov/vuln/detail/CVE-2026-89632
- https://git.kernel.org/stable/c/b70bc592afd19732e2e4563300ebe8f974280365
- https://git.kernel.org/stable/c/711cf71300d7992f450600df8864917d3538679f
- https://git.kernel.org/stable/c/05f78e6cf34ea3a285053bd5999e08e8ac298bd5