CVE-2022-49325
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
26/02/2025
Last modified:
22/09/2025
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
tcp: add accessors to read/set tp->snd_cwnd<br />
<br />
We had various bugs over the years with code<br />
breaking the assumption that tp->snd_cwnd is greater<br />
than zero.<br />
<br />
Lately, syzbot reported the WARN_ON_ONCE(!tp->prior_cwnd) added<br />
in commit 8b8a321ff72c ("tcp: fix zero cwnd in tcp_cwnd_reduction")<br />
can trigger, and without a repro we would have to spend<br />
considerable time finding the bug.<br />
<br />
Instead of complaining too late, we want to catch where<br />
and when tp->snd_cwnd is set to an illegal value.
Impact
Base Score 3.x
5.50
Severity 3.x
MEDIUM
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.15.47 (excluding) | |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.16 (including) | 5.17.15 (excluding) |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.18 (including) | 5.18.4 (excluding) |
To consult the complete list of CPE names with products and versions, see this page