Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: tcp: add accessors to read/set tp->snd_cwnd We had various bugs over the years with code breaking the assumption that tp->snd_cwnd is greater than zero. Lately, syzbot reported the WARN_ON_ONCE(!tp->prior_cwnd) added in commit 8b8a321ff72c ("tcp: fix zero cwnd in tcp_cwnd_reduction") can trigger, and without a repro we would have to spend considerable time finding the bug. Instead of complaining too late, we want to catch where and when tp->snd_cwnd is set to an illegal value.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 5d424d5a674f782d0659a3b66d951f412901faee before 3308676ec525901bf1656014003c443a60730a04; affected 5d424d5a674f782d0659a3b66d951f412901faee before 5aba0ad44fb4a7fb78c5076c313456de199a3c29; affected 5d424d5a674f782d0659a3b66d951f412901faee before 41e191fe72282e193a7744e2fc1786b23156c9e4; affected 5d424d5a674f782d0659a3b66d951f412901faee before 40570375356c874b1578e05c1dcc3ff7c1322dbe |
| Linux / Linux | affected 2.6.17; unaffected 0 before 2.6.17; unaffected 5.15.47 through 5.15.*; unaffected 5.17.15 through 5.17.*; unaffected 5.18.4 through 5.18.*; unaffected 5.19 through * |
CWE
No CWE identifiers supplied.