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: mptcp: fastopen: only mark MPTFO subflows with SYN data Passive TCP Fast Open accepts a valid-cookie SYN even when it carries no data. In that case the child socket's receive queue is intentionally left empty. mptcp_fastopen_subflow_synack_set_params() set is_mptfo before checking for queued SYN data. That made data-less TFO SYNs hit a WARN and, if the warning was non-fatal, left stale MPTFO state behind. The stale flag could later trigger a state-confusion bug in check_fully_established(). Only mark the subflow as MPTFO after confirming that an SKB was queued. Return quietly when the receive queue is empty. Note that mptcp_subflow_context's is_mptfo field is now not just about subflows where the TFO was present, but about MPTFO subflow that consumed SYN data. Only having a valid cookie but not carrying data is not really "doing TFO".
Засегнати продукти
- Linux Linux: 36b122baf6a8bd46b4a591f12f4ed17b22257408 преди f75f174edc865738522e514d042cf5627f084859; 36b122baf6a8bd46b4a591f12f4ed17b22257408 преди fca7e444c04689fe4cc6b56f2725f804a4bb1ef9; 36b122baf6a8bd46b4a591f12f4ed17b22257408 преди 75e564b2ced1cc3d9a8904c7d2d2bb448fffb8b5; 36b122baf6a8bd46b4a591f12f4ed17b22257408 преди 72b4a0c51a4b550d40301d60a366b429b8c8e78d; 36b122baf6a8bd46b4a591f12f4ed17b22257408 преди e00b63056fb4f261455b3e5df5268a1f8ce47a87
- Linux Linux: 6.2; преди 6.2; 6.6.153 до 6.6.*; 6.12.105 до 6.12.*; 6.18.46 до 6.18.*; 7.1.10 до 7.1.*; от 7.2 нататък
История
- 26 август 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-80585
- https://nvd.nist.gov/vuln/detail/CVE-2026-80585
- https://git.kernel.org/stable/c/f75f174edc865738522e514d042cf5627f084859
- https://git.kernel.org/stable/c/fca7e444c04689fe4cc6b56f2725f804a4bb1ef9
- https://git.kernel.org/stable/c/75e564b2ced1cc3d9a8904c7d2d2bb448fffb8b5
- https://git.kernel.org/stable/c/72b4a0c51a4b550d40301d60a366b429b8c8e78d
- https://git.kernel.org/stable/c/e00b63056fb4f261455b3e5df5268a1f8ce47a87