Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: bpf, skmsg: fix verdict sk_data_ready racing with ktls rx sk_psock_strp_data_ready() already checks tls_sw_has_ctx_rx() and defers to psock->saved_data_ready when a TLS RX context is present, avoiding a conflict with the TLS strparser's ownership of the receive queue (commit e91de6afa81c, "bpf: Fix running sk_skb program types with ktls"). sk_psock_verdict_data_ready() has no equivalent guard. When a socket is inserted into a sockmap (BPF_SK_SKB_VERDICT) before TLS RX is configured, tls_sw_strparser_arm() saves sk_psock_verdict_data_ready as rx_ctx->saved_data_ready. On data arrival: tls_data_ready -> tls_strp_data_ready -> tls_rx_msg_ready -> saved_data_ready() = sk_psock_verdict_data_ready() -> tcp_read_skb() drains sk_receive_queue via __skb_unlink() without calling tcp_eat_skb(), so copied_seq is not advanced. tls_strp_msg_load() then finds tcp_inq() >= full_len (stale), calls tcp_recv_skb() on the now-empty queue, hits WARN_ON_ONCE(!first), and returns with rx_ctx->strp.anchor.frag_list pointing at a psock-owned (potentially freed) skb. tls_decrypt_sg() subsequently walks that frag_list: use-after-free. Apply the same fix as sk_psock_strp_data_ready(): if a TLS RX context is present, call psock->saved_data_ready (sock_def_readable) to wake recv() waiters and return immediately, leaving the receive queue untouched. TLS retains sole ownership of the queue and decrypts the record normally through tls_sw_recvmsg().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ef5659280eb13e8ac31c296f58cfdfa1684ac06b before c9ea01768903ae47f210cd457af1dead6de7a9c3; affected ef5659280eb13e8ac31c296f58cfdfa1684ac06b before 7c8cf21bc4efb4af18d6096db3f8bd06d622251c; affected ef5659280eb13e8ac31c296f58cfdfa1684ac06b before 1861d369efd62d67796563bf3e01fc22e5626f8b; affected ef5659280eb13e8ac31c296f58cfdfa1684ac06b before 8a52139560f833c3975032e1f5762611e3a36d71; affected ef5659280eb13e8ac31c296f58cfdfa1684ac06b before ddf8029623a1af20e984c040e89ff918158397ab |
| Linux / Linux | affected 5.10; unaffected 0 before 5.10; unaffected 6.6.142 through 6.6.*; unaffected 6.12.92 through 6.12.*; unaffected 6.18.34 through 6.18.*; unaffected 7.0.11 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c9ea01768903ae47f210cd457af1dead6de7a9c3
- https://git.kernel.org/stable/c/7c8cf21bc4efb4af18d6096db3f8bd06d622251c
- https://git.kernel.org/stable/c/1861d369efd62d67796563bf3e01fc22e5626f8b
- https://git.kernel.org/stable/c/8a52139560f833c3975032e1f5762611e3a36d71
- https://git.kernel.org/stable/c/ddf8029623a1af20e984c040e89ff918158397ab
ADP enrichment
No English description supplied.
No references supplied.