CVE-2022-49325

tcp: add accessors to read/set tp->snd_cwnd

Description

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.

N/A

CVSS

Severity:

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/3308676ec525901bf1656014003c443a60730a04
https://git.kernel.org/stable/c/5aba0ad44fb4a7fb78c5076c313456de199a3c29
https://git.kernel.org/stable/c/41e191fe72282e193a7744e2fc1786b23156c9e4
https://git.kernel.org/stable/c/40570375356c874b1578e05c1dcc3ff7c1322dbe

Frequently Asked Questions

What is the severity of CVE-2022-49325?: CVE-2022-49325 has not yet been assigned a CVSS score.
How to fix CVE-2022-49325?: To fix CVE-2022-49325, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49325 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-49325 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49325?: CVE-2022-49325 affects Linux Linux, Linux Linux.

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