What’s Vulnerable › Vulnerabilities

CVE-2022-50783: mptcp: use proper req destructor for IPv6

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-24 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: mptcp: use proper req destructor for IPv6 Before, only the destructor from TCP request sock in IPv4 was called even if the subflow was IPv6. It is important to use the right destructor to avoid memory leaks with some advanced IPv6 features, e.g. when the request socks contain specific IPv6 options.

Affected products

• Linux kernel: 5.6 — fixed in 6.2

How to fix

Upgrade to a fixed version: Linux kernel 6.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/092953f3c4cd65f88b27b87a922f6c725f34ee04
• https://git.kernel.org/stable/c/1922ea6b0ae2ea0c9a09be0eafafe1cd1069d259
• https://git.kernel.org/stable/c/6eb02c596ec02e5897ae377e065cb7df55337a96
• https://git.kernel.org/stable/c/bd5dc96fea4edd16d2e22f41b4dd50a4cfbeb919
• https://git.kernel.org/stable/c/d3295fee3c756ece33ac0d935e172e68c0a4161b

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