What is CVE-2022-50865?

CVE-2022-50865 is a high-severity vulnerability in Linux. CVSS score: 7.5/10. Published 2025-12-30.

How severe is CVE-2022-50865?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Linux

CVE-2022-50865

In the Linux kernel, the following vulnerability has been resolved: tcp: fix a signed-integer-overflow bug in tcp_add_backlog() The type of sk_rcvbuf and sk_sndbuf in struct sock is int, and in tcp_add_backlog(), the variable limit is caculated by adding sk_rcvbuf, sk_sndbuf and 64 * 1024, it may exceed the max value of int and overflow. This patch reduces the limit budget by halving the sndbuf to solve this issue since ACK packets are much smaller than the payload.

EPSS: 0.002 (6.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions c9c3321257e1b95be9b375f811fb250162af8d39, 4.9, 0

References

Frequently asked questions

What is CVE-2022-50865?: CVE-2022-50865 is a high-severity vulnerability in Linux. CVSS score: 7.5/10. Published 2025-12-30.
How severe is CVE-2022-50865?: High severity. CVSS v3 base score is 7.5 out of 10.