Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b701a99e431db784714c32fc6b68123045714679 before 7bb7670f92bfbd05fc41a8f9a8f358b7ffed65f4; affected b701a99e431db784714c32fc6b68123045714679 before d2346fca5bed130dc712f276ac63450201d52969; affected b701a99e431db784714c32fc6b68123045714679 before 5d7e64d70a11d988553a08239c810a658e841982; affected b701a99e431db784714c32fc6b68123045714679 before 04317a2471c2f637b4c49cbd0e9c0d04a519f570; affected b701a99e431db784714c32fc6b68123045714679 before e113cddefa27bbf5a79f72387b8fbd432a61a466; affected b701a99e431db784714c32fc6b68123045714679 before dfcdd7f89e401d2c6616be90c76c2fac3fa98fde; affected b701a99e431db784714c32fc6b68123045714679 before 66cb64a1d2239cd0309f9b5038b05462570a5be1; affected b701a99e431db784714c32fc6b68123045714679 before 97a9063518f198ec0adb2ecb89789de342bb8283 |
| Linux / Linux | affected 4.19; unaffected 0 before 4.19; unaffected 4.19.318 through 4.19.*; unaffected 5.4.280 through 5.4.*; unaffected 5.10.222 through 5.10.*; unaffected 5.15.163 through 5.15.*; unaffected 6.1.100 through 6.1.*; unaffected 6.6.41 through 6.6.*; unaffected 6.9.10 through 6.9.*; unaffected 6.10 through * |
CWE
No CWE identifiers supplied.
References
- 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
ADP enrichment
No English description supplied.
- 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://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
No English description supplied.
No references supplied.