CVE-2024-41007: Linux Kernel

Low severity, CVSS 3.3. EPSS: 0.8% chance of exploitation in the next 30 days.

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.

Affected products

• Linux Linux Kernel: from 4.19, before 5.4.280 (fixed in 5.4.280); from 5.5, before 5.10.222 (fixed in 5.10.222); from 5.11, before 5.15.163 (fixed in 5.15.163); from 5.16, before 6.1.100 (fixed in 6.1.100); from 6.2, before 6.6.41 (fixed in 6.6.41); from 6.7, before 6.9.10 (fixed in 6.9.10)

Published 2024-07-15. Last modified 2026-08-04.