Rocky Linux: CVE-2024-41007: kernel-rt (RLSA-2024-7001)

Rocky Linux: CVE-2024-41007: kernel-rt (RLSA-2024-7001)

Severity

2

CVSS

(AV:L/AC:L/Au:S/C:N/I:N/A:P)

Published

07/15/2024

Created

10/03/2024

Added

10/02/2024

Modified

01/30/2025

Description

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.

Solution(s)

• rocky-upgrade-kernel-rt
• rocky-upgrade-kernel-rt-core
• rocky-upgrade-kernel-rt-debug
• rocky-upgrade-kernel-rt-debug-core
• rocky-upgrade-kernel-rt-debug-debuginfo
• rocky-upgrade-kernel-rt-debug-devel
• rocky-upgrade-kernel-rt-debug-kvm
• rocky-upgrade-kernel-rt-debug-modules
• rocky-upgrade-kernel-rt-debug-modules-extra
• rocky-upgrade-kernel-rt-debuginfo
• rocky-upgrade-kernel-rt-debuginfo-common-x86_64
• rocky-upgrade-kernel-rt-devel
• rocky-upgrade-kernel-rt-kvm
• rocky-upgrade-kernel-rt-modules
• rocky-upgrade-kernel-rt-modules-extra

References

• https://attackerkb.com/topics/cve-2024-41007
• CVE - 2024-41007
• https://errata.rockylinux.org/RLSA-2024:7001