CVE-2022-49325: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.6% chance of exploitation in the next 30 days.

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 products

• Linux Linux Kernel: before 5.15.47 (fixed in 5.15.47); from 5.16, before 5.17.15 (fixed in 5.17.15); from 5.18, before 5.18.4 (fixed in 5.18.4)

Published 2025-02-26. Last modified 2026-08-04.