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Vulnerability record · CVE-2024-41007 · published 15 July 2024

CVE-2024-41007: Linux kernel vulnerability

Linux · Linux Kernel

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.

3.3 CVSS 3.1 Low EPSS 0.77% · top 46.1%
3.3CVSS 3.1 base score
0.77%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
17References
4 Aug 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/04317a2471c2f637b4c49cbd0e9c0d04a519f570 Patch
https://git.kernel.org/stable/c/5d7e64d70a11d988553a08239c810a658e841982 Patch
https://git.kernel.org/stable/c/66cb64a1d2239cd0309f9b5038b05462570a5be1 Patch
https://git.kernel.org/stable/c/7bb7670f92bfbd05fc41a8f9a8f358b7ffed65f4 Patch
https://git.kernel.org/stable/c/97a9063518f198ec0adb2ecb89789de342bb8283 Patch
https://git.kernel.org/stable/c/d2346fca5bed130dc712f276ac63450201d52969 Patch
https://git.kernel.org/stable/c/dfcdd7f89e401d2c6616be90c76c2fac3fa98fde Patch
https://git.kernel.org/stable/c/e113cddefa27bbf5a79f72387b8fbd432a61a466 Patch
https://git.kernel.org/stable/c/04317a2471c2f637b4c49cbd0e9c0d04a519f570 Patch
https://git.kernel.org/stable/c/5d7e64d70a11d988553a08239c810a658e841982 Patch
https://git.kernel.org/stable/c/66cb64a1d2239cd0309f9b5038b05462570a5be1 Patch
https://git.kernel.org/stable/c/7bb7670f92bfbd05fc41a8f9a8f358b7ffed65f4 Patch
https://git.kernel.org/stable/c/97a9063518f198ec0adb2ecb89789de342bb8283 Patch
https://git.kernel.org/stable/c/d2346fca5bed130dc712f276ac63450201d52969 Patch
https://git.kernel.org/stable/c/dfcdd7f89e401d2c6616be90c76c2fac3fa98fde Patch
https://git.kernel.org/stable/c/e113cddefa27bbf5a79f72387b8fbd432a61a466 Patch
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

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Source: NIST National Vulnerability Database (record CVE-2024-41007), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.