What’s Vulnerable › Vulnerabilities

CVE-2022-49020: net/9p: Fix a potential socket leak in p9_socket_open

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-10-21 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: net/9p: Fix a potential socket leak in p9_socket_open Both p9_fd_create_tcp() and p9_fd_create_unix() will call p9_socket_open(). If the creation of p9_trans_fd fails, p9_fd_create_tcp() and p9_fd_create_unix() will return an error directly instead of releasing the cscoket, which will result in a socket leak. This patch adds sock_release() to fix the leak issue.

Affected products

• Linux kernel: from 2.6.33 before 4.9.335; from 4.10 before 4.14.301; from 4.15 before 4.19.268; from 4.20 before 5.4.226; from 5.5 before 5.10.158; from 5.11 before 5.15.82 — fixed in 4.14.301, 4.19.268, 4.9.335, 5.10.158, 5.15.82, 5.4.226

How to fix

Upgrade to a fixed version: Linux kernel 4.14.301, 4.19.268, 4.9.335, 5.10.158. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0396227f4daf4792a6a8aaa3b7771dc25c4cd443
• https://git.kernel.org/stable/c/2d24d91b9f44620824fc37b766f7cae00ca32748
• https://git.kernel.org/stable/c/8782b32ef867de7981bbe9e86ecb90e92e8780bd
• https://git.kernel.org/stable/c/8b14bd0b500aec1458b51cb621c8e5fab3304260
• https://git.kernel.org/stable/c/aa08323fe18cb7cf95317ffa2d54ca1de8e74ebd
• https://git.kernel.org/stable/c/dcc14cfd7debe11b825cb077e75d91d2575b4cb8
• https://git.kernel.org/stable/c/ded893965b895b2dccd3d1436d8d3daffa23ea64
• https://git.kernel.org/stable/c/e01c1542379fb395e7da53706df598f38905dfbf

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