CVE-2024-41007: tcp: avoid too many retransmit packets
First published: Mon Jul 15 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.10 | 6.10 |
| Linux Kernel | >=4.19<5.4.280 | |
| Linux Kernel | >=5.5<5.10.222 | |
| Linux Kernel | >=5.11<5.15.163 | |
| Linux Kernel | >=5.16<6.1.100 | |
| Linux Kernel | >=6.2<6.6.41 | |
| Linux Kernel | >=6.7<6.9.10 | |
| IBM Security Verify Governance - Identity Manager | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Software Stack | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Virtual Appliance | <=ISVG 10.0.2 | |
| IBM Security Verify Governance Identity Manager Container | <=ISVG 10.0.2 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.135-1 6.12.22-1 6.12.25-1 | |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
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Reference Links
- https://access.redhat.com/errata/RHSA-2024:7001
- https://access.redhat.com/errata/RHSA-2024:7000
- https://access.redhat.com/errata/RHSA-2024:9315
- https://access.redhat.com/errata/RHSA-2024:10771
- https://bugzilla.redhat.com/show_bug.cgi?id=2297909
- https://git.kernel.org/stable/c/7bb7670f92bfbd05fc41a8f9a8f358b7ffed65f4
- https://git.kernel.org/stable/c/d2346fca5bed130dc712f276ac63450201d52969
- https://git.kernel.org/stable/c/5d7e64d70a11d988553a08239c810a658e841982
- https://git.kernel.org/stable/c/04317a2471c2f637b4c49cbd0e9c0d04a519f570
- https://git.kernel.org/stable/c/e113cddefa27bbf5a79f72387b8fbd432a61a466
- https://git.kernel.org/stable/c/dfcdd7f89e401d2c6616be90c76c2fac3fa98fde
- https://git.kernel.org/stable/c/66cb64a1d2239cd0309f9b5038b05462570a5be1
- https://git.kernel.org/stable/c/97a9063518f198ec0adb2ecb89789de342bb8283
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-41007
- https://nvd.nist.gov/vuln/detail/CVE-2024-41007
- https://launchpad.net/bugs/cve/CVE-2024-41007
- https://security-tracker.debian.org/tracker/CVE-2024-41007
- https://ubuntu.com/security/CVE-2024-41007
- https://git.kernel.org/linus/97a9063518f198ec0adb2ecb89789de342bb8283
- https://www.ibm.com/support/pages/node/7230443 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2024-41007?
CVE-2024-41007 is a medium severity vulnerability in the Linux kernel.
How do I fix CVE-2024-41007?
To remediate CVE-2024-41007, upgrade the kernel to version 6.10 or the specific patched versions listed for your distribution.
Which Linux kernel versions are affected by CVE-2024-41007?
CVE-2024-41007 affects multiple Linux kernel versions, specifically those between 4.19 and 6.10.
What is the impact of CVE-2024-41007?
The impact of CVE-2024-41007 involves excessive retransmit packets from TCP sockets, potentially leading to network performance issues.
Is CVE-2024-41007 related to TCP sockets?
Yes, CVE-2024-41007 specifically concerns the behavior of TCP sockets using TCP_USER_TIMEOUT.
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