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CVE-2026-99123: Linux

7.1

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 локално, 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: vsock/virtio: validate packet source for connected sockets virtio_transport_recv_pkt() looks up sockets first by the full source and destination tuple, then by destination only in the bound table. The fallback is needed for listening and connecting sockets, but sockets remain in the bound table after connect(), so it can also return a non-listening socket. The fallback does not validate the source address. In TCP_SYN_SENT, a RESPONSE from an unrelated source can transition the victim socket to TCP_ESTABLISHED while its stored remote address remains unchanged. Subsequent RW packets from that source are delivered through the same destination-only fallback. This was reproduced with capability-empty processes under different UIDs. The attacker discovered the target tuple through unprivileged AF_VSOCK sock_diag and caused the victim socket to read 16 attacker-chosen bytes; the intended peer-side socket read 0 of those 16 bytes. Add vsock_check_source() to validate the transport, source port and source CID against the peer stored in a non-listening socket. The local transport is the CID exception because its packets are generated internally with VMADDR_CID_LOCAL as their source, including connections using CID aliases. Use the helper after lock_sock() in the virtio receive path.

    Засегнати продукти

    • Linux Linux: 06a8fc78367d070720af960dcecec917d3ae5f3b преди bda841af86cdfe7fcf4a2f4db22e27f1b852b1ff; 06a8fc78367d070720af960dcecec917d3ae5f3b преди c0a3a786a5e8b5007d6a3c34721ab052399ab2ad; 06a8fc78367d070720af960dcecec917d3ae5f3b преди f77fb90edca5385d0eecbfd6d2c8ef60afff24a9; 06a8fc78367d070720af960dcecec917d3ae5f3b преди ec231dd3b14e541ba1c4f842a7d152fb61037333; 06a8fc78367d070720af960dcecec917d3ae5f3b преди 6cd829de69efd9ed3a53aa2421004a0396eb2bd7; 06a8fc78367d070720af960dcecec917d3ae5f3b преди e9bf92de436ba55f33eaa55d7008e68551123cfd; 06a8fc78367d070720af960dcecec917d3ae5f3b преди dee44f41f206becb41c492899c1996cfd7f82a1b
    • Linux Linux: 4.8; преди 4.8; 5.15.224 до 5.15.*; 6.1.191 до 6.1.*; 6.6.161 до 6.6.*; 6.12.115 до 6.12.*; 6.18.59 до 6.18.*; 7.2.13 до 7.2.*; от 7.3 нататък

    История

    • 28 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-99123: Linux | freedomonline.bg