What is CVE-2022-50865?

CVE-2022-50865 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10, affecting Linux kernel versions from 4.9 onward and patched in 5.4.278, 5.10.153, 5.15.77 and others. CVE-2022-50865 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-50865?

CVE-2022-50865 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2022-50865?

Yes, CVE-2022-50865 has been patched. Fixed versions include 5.4.278, 5.10.153, 5.15.77 and others. If you are running Linux kernel 4.9 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2022-50865 actively exploited?

CVE-2022-50865 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2022-50865

High

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.

Package Linux Kernel

Published 2025-12-30

Last modified 2026-08-04

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 4.9 and later are affected. Fixed in 5.4.278, 5.10.153, 5.15.77, 6.0.7, 6.1 and their respective stable series.

Affected from

≥ 4.9

Fixed in

✓ 5.4.278 5.4.x ✓ 5.10.153 5.10.x ✓ 5.15.77 5.15.x ✓ 6.0.7 6.0.x ✓ 6.1

References

5 total

Details

CVE ID CVE-2022-50865

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2025-12-30

Modified 2026-08-04

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2022-50865?

CVE-2022-50865 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 . It affects Linux kernel versions from 4.9 onward and has been patched in 5.4.278, 5.10.153, 5.15.77 and others. CVE-2022-50865 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-50865?

CVE-2022-50865 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2022-50865?

Yes. CVE-2022-50865 has been patched. Fixed versions include 5.4.278, 5.10.153, 5.15.77 and others. If you are running Linux kernel 4.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2022-50865 actively exploited?

No. CVE-2022-50865 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.