CVE-2024-41007

In the Linux kernel, the following vulnerability has been resolved: tcp: avoid too many retransmit packets If a TCP socket is using TCP_USER_TIMEOUT, and the other peer retracted its window to zero, tcp_retransmit_timer() can retransmit a packet every two jiffies (2 ms for HZ=1000), for about 4 minutes after TCP_USER_TIMEOUT has 'expired'. The fix is to make sure tcp_rtx_probe0_timed_out() takes icsk->icsk_user_timeout into account. Before blamed commit, the socket would not timeout after icsk->icsk_user_timeout, but would use standard exponential backoff for the retransmits. Also worth noting that before commit e89688e3e978 ("net: tcp: fix unexcepted socket die when snd_wnd is 0"), the issue would last 2 minutes instead of 4.

• linux linux kernel (>= 4.19 < 5.4.280) • linux linux kernel (>= 5.5 < 5.10.222) • linux linux kernel (>= 5.11 < 5.15.163) • linux linux kernel (>= 5.16 < 6.1.100) • linux linux kernel (>= 6.2 < 6.6.41) • linux linux kernel (>= 6.7 < 6.9.10)